Ngk tr55 vs tr5. The TR55 specifically gapped @ .

Ngk tr55 vs tr5. For the LS3, most seem to go with Aug 29, 2012 · Bosch +2 NGK TR-55 or TR6 TCCOA recommends: Autolite 5143 or NGK TR5 MOTORCRAFT PART# / HEAT RANGE AWSF-32C / stock heat range - copper plug AWSF-22C / 1 Heat range colder - copper plug AWSFA-12C / 2 Hea range cooler - copper plug AGSF-32C/ Recommended for FRPP heads (not sure on heat range) NGK PART# / HEAT RANGE TR55/3951/TR55IX/7164 Stock Apr 10, 2010 · I'm ordering the NGK tr55 plugs and looking at pricing and different web sites for a deal. The LS2 is spec'd at . FOR REFERENCE ONLY FOR REFERENCE ONLY FOR REFERENCE ONLY FOR REFERENCE ONLY FOR REFERENCE ONLY FOR REFERENCE ONLY FOR REFERENCE ONLY FOR REFERENCE ONLY FOR REFERENCE Aug 26, 2008 · By doing a search on NGK's site they list their plain jane plugs for the gto as V-power TR5 2238 . Great for use with cam/head cars. tr5's are gapped at . 05, but i don't know what that means! so which one will work better on a car with only a cia, headers, and cat-back? Oct 10, 2009 · Charlie, is there a difference between the tr5 and tr55 plug? When I look them up they are in the same heat range. 035 gap BR7EF- 3346. Price? May 2, 2006 · C4 Tech/Performance - Ngk Tr55 Vs. The special V-cut center electrode and concave ground electrode of NGK's V-Power spark plug increases ignitibility. May 6, 2009 · NGK TR55 and TR55IX are gapped at . The correct T-stat depends on your production/VIN. I would say TR5 or TR55 would be a great plug for your application. ***Note: List is intended for reference only. The GM specs for the LS2 shows the spark plug gap is . 040 I think. PayPal Accepted. Like the title says, what plugs are you all using for the LS3? I used NGK TR55 IX Iridium plugs on my previous LS2, and was very satisfied. NGK V-Power Spark Plug Heat Range 5 (TR55) NGK V-Power spark plugs offer reliable performance and improved ignitability over standard nickel plugs. 1 heat range colder . 040" and the TR55 comes at . 050" gap. SOLD!!!!!! Aug 14, 2012 · C6 Tech/Performance - LS3 guys, do you run TR5's or TR6's? - I put a set of 6's in a H/C/I 2010 Camaro I just finished gapped at . 055 gap TR6- 4177. Nov 22, 2005 · Originally Posted by VetteGuy1999 Any advice on spark plugs, either the NGK TR-55 or the TR-6? If your engine runs better with a smaller spark gap then you have to go with the TR-6s which are also better if you have headers. Both both plugs ran good for me. Feb 19, 2025 · Your tuner meant TR5, not TR55. I got them on amazon for $20. Can I still run the TR6's with it n/a? I know most people run the TR55's. Jul 6, 2006 · Product Description NGK manufactures and sells spark plugs and related products for internal combustion engines, along with ceramics and applicable products. I use TR55. NGK TR-5 plugs are the stock replacement application for the LS2 and later LS engines. Anyone know which one to get? The TR55 plugs are for the C5 guys. The NGK rep said these are a downgrade since they are a copper plug and not an iridium stock-style plug. " Not wanting to deal with any more of his lack of attention to what I asked I just left and figured I could return them later. They are the same heat range, but I the TR5 comes gapped at . Mar 24, 2009 · TR5 gapped at . Jun 20, 2004 · The IX plug would put you back pretty close to the OEM Delco plug which is made by NGK. The TR5 comes gapped at . NGK's web site says not to change the gap of there spark plug by more than . I run TR6's in my LS3 w/blower. ABTOKOHNHBECT A17AB-10 MOTORCRAFTAS52C bought some iridium plugs, tr55 ngk. 040" gap IIRC May 4, 2012 · Which is TR55. The TR55's will work fine for your GTO. 040 Iridium IX TR5IX 7397 . These plugs enhance ignitability, lower the voltage requirements of ignition systems, and have strong anti-fouling characteristics, while improving fuel mileage and acceleration performance. 040" is a big mistake. The TR6 plugs are better suited for a nitrous or forced induction application since they are one heat range colder than stock. com: TR55 $4. I'd personally say TR5, for the following reasons. Let me know if you need any help. Apr 27, 2025 · Top wjcollier07 Post subject: Re: NGK TR5 vs TR55 Posted: Fri Jun 20, 2008 5:03 pm Certified Bonneville Nut Joined: Thu May 22, 2008 7:08 pm Posts: 5647 Year and Trim: ____ You need TR55,# 3951 TR5s are 0. 8:1 compression ratio. Of course most people seem to recommend NGK TR55. Apr 3, 2002 · C5 Tech - Ngk TR55 or TR5 - Just wondering what is the difference between the two and which one should I install ? Oct 17, 2016 · Sounds like TR55's and be done with it for 20,000 miles? I used NGK TR6's on my nitrous C5 that I had and they worked well. And the tr-5 is gapped at . My other Dec 5, 2019 · Buy NGK 3951 Spark Plugs TR55 (6 Pack): Spark Plugs - Amazon. Are the iridiums gonna be any better then the regualr copper or did i just waste my money at 7 bucks a plug. I was confused by the NGK website which incorrectly listed the TR55 for the 2005 Corvette. So should I just leave them or would you guys suggest swapping them out for either a new set of NGK plugs or maybe the OEM AC Delco iridiums? If NGK, then which ones, TR5, TR55 or TR6? It’s an NA cam only LS3. 22 NGK 3951 Spark Plug - Best Car Spark Plug Replacement The TR-5 and TR-55 is the same head range, you can call NGK to verify, the only difference is the end of the TR5 comes off for some European cars and the gap on the Tr-5 is . Cool when I installed my NGK TR6's the box said to gap to manufactors specifications, which for the LS2 is . They will work fine. Is this the same plug/ One is a tr5 and the other a tr55? Oct 21, 2009 · I notice everyone here is referring to the plug as the NGK TR55 My guy at advance had it in his system as TR5, and the NGK website has them listed at NGK TR5. 055 and now they have opened to . TR5 and TR55 are both copper plugs, the difference between the two part numbers is the gap (TR5's = . "stock measured out in the 7s" The Weld process for the electrode strap is not made to be regapped according to them. Seen this over on pt. I've read here that NGK TR55's are the way to go especially for the money. 040 OE Laser Iridium ITR5F13 ^ 6044 . NGK, renowned for its expertise and innovation, is a trusted leader in spark plug technology with a long-standing reputation. What are yours gapped at? NGK V-Power spark plugs offer economical performance for nearly any automotive application—and they're the only plugs with NGK's V-Groove technology. Feb 21, 2006 · TR55. 3. 5 to . Ignitability is improved by the V-groove cut in the center electrode parallel to the ground electrode, this directs the spark to to the edge of the center electrode thus exposing it to more of the air/fuel mixture. I can't stand when people neglect their vehicles mechanically. Est. 039 and the gap on the Tr-55 is . 3L/325: Spark Plugs - Amazon. The other option is IX - Irridium. Trust me, these spark plugs are a game changer. If you want the iriduim version of either plug just add "IX" to the part number. 059" gap. For your full bolt on cam car, you're better off with TR6 which is one heat range colder (will help prevent detonation/pre ignition). NGK TR55 (pn3951) or 6 for FI aps. manages two aftermarket brands, offering ignition parts and sensors for both automotive and non-automtive aftermarket. Feb 1, 2011 · TR5- 2238 stock heat range . 35 gap in my H/C LS2. Your splitting hairs IMO the only difference between the two is the gap. 040 gap. Thanks. NGK Part No. 032 gap B8EFS- 1049. The difference is the gap. And thats it. I thought i read before they were the shit, but now im not so sure. this compared to NGK. I never had any problems and sprayed 175hp shot on that car. Note: The TR55s are factory gapped at NGK 3951 TR55 Spark Plug - Same Day Shipping. The TR5 comes pregapped at . 040 G-Power TR5GP 3186 . Jul 2, 2018 · Has anyone tried both versions and noticed a decrease or an increase of performance with either plug ? Right at 400hp. So, if anyone purchases these plugs with the expectation of having a . Thanks in advance. 059. 040 on the ac Delco plugs. ??? Both plugs are available in copper, platinum and iridium flavors. 35". Find the right NGK V-Power Nickel Plug Number TR55 Spark Plug for your vehicle at O'Reilly Auto Parts. com they plugs shown for my 99 Z28 are NGK TR5s with a gap of . 040 Laser Platinum PTR5D-10 * 3784 . He also said that when gapping, it's not recommended to bend the electrode +/- more than . May 5, 2005 · Any NGK spark plug that starts with an “R” is a racing plug (it is important you note we said it starts with an “R”, not that it has an “R” in it) For the NGK racing plugs, the heat range is after the dash IE: R5671A-10 is a 10 heat range. 060". TR5 is gapped at . What would you use? Motor is a 320 monsoon Apr 11, 2024 · If your running the 85 or 87 octane with that engine i run NGK TR6 with stock tune. Hotter plugs are listed above the colder plugs. 40, I noticed though everyone with the NGK tr55 plugs mostly have longtube headers. . I switched to ngk tr6 plugs. Competitor # NGK Stock # NGK Part # Competitor # NGK Stock # NGK Part # Competitor # NGK Stock # NGK Part # Accel 112 2912 BP8ES 113 1034 BP7ES 114 7333 BP6ES 115 7432 B6ES 116 78 Feb 7, 2014 · NGK TR6 plugs Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons I tested and highly recommend the NGK TR55 Spark Plugs for superior engine performance. Aug 11, 2006 · Buy NGK 3951 TR55 NGK-Power Spark Plug: Spark Plugs - Amazon. Only difference between the 2 is the gap according to ngk. 039 while the TR55 comes in at . Mar 2, 2009 · C5 Tech - Plugs for my appl. Ngk55gp Or Copper Vs. 035 gap TR55- 3951 stock heat range . 05-. This maybe old school, I am under the impression that "copper" transfers a hotter spark. I slapped in a set last spring, and it's coming up on 30,000 miles for them. The manual ca Sep 11, 2009 · The only difference between a TR5 and a TR55 is the gap, and nothing else. 34 replacement spark plugs found for NGK TR5IX. will the heat range difference between the plugs make a difference in kr Dec 29, 2014 · Sparkplug cross reference between Autolite Racing, AC Delco, Champion and NGK. I get mine from Carparts. If you are going to track the car and want better reliability and performance switch to a Silver electrode plug. May 7, 2010 · The NGK spark plugs do come pre-gapped, but I always recommend checking them. 45 , i did it cause the gap increase is only . Forget about Platinum, Iridium and Copper. Two things I want to mention to all of you about an experience with my TR55's 1- Because TR55's need to be changed a bit more often than iridiums this gives the owner more reason to get into the engine bay more often and clean, work, mod etc. Aug 4, 2008 · NGK TR55's are OK for street applications. Anyway, my question is, which NGK plus to use? I found in some threads people say NGK BRP6EFS, and some say NGK TR5. NGK TR-55 plugs are the stock replacement application for the LS1. Jun 20, 2006 · C5 Tech - NGK Tr-55 vs Iridium - Just wondering what most people are using, I heard the newer vettes come with iridium plugs now, when did they stop using the platinum tipped plugs?was it because of all the problems with the pucks coming off? also with the iridium plugs I know you aren't suppose to gap them, but what Mar 30, 2015 · So I've searched a few times and found recommendations for both tr5s and tr55s. the manufacturer don't recommend decreasing/increasing the gap more than . Dec 2, 2003 · C4 Tech/Performance - L98 Guys With NGK Plugs: Which Part Number? - I'm getting conflicting signals as to which copper plug to get. Jan 20, 2021 · Stock LS3 NGK TR5 or TR55? The stock plug gap is . Also, gapping iridium plugs is risky business. But upon heavy internet research I found that it will work but the gap that is recommended is . With NGK the higher the number the colder the plug. I use the NGK tr6 but if I had a NA car id use the tr5 ,the autozone Nipindenso,is also a great choice,both have a two year free replacement,I replace mine ,some times two times a year. Does what i am describing above, effect the ignition timing (pre-ignition Jun 26, 2007 · Copied from another board. AC/Delco - So I decided to upgrade to what I thought would be an upgrade in spark plugs which were the NGK TR5 V-Power plugs from my stock LS3 AC/Delco plugs. i tried to find the TR55s but i couldnt find them. 5 by Total Engine Mar 22, 2009 · The difference between the TR5 and TR55 is that they come with a different gap. I'm going to pickup some TR5's and gap to . Most folks, including myself, seems to like the plain Jane copper TR55 gapped a little wider than stock. 060" out of the box so if you're running the tr5's on a n/a motor you'll want to regap them. Knock sensors dont have to work as hard with on step colder plug. Search the thermostat threads. Feb 27, 2010 · Hey guys, I have been searching and looking at a ton of posts on the whole spark plug gap. One source says FR4, another guy says FR5, yet another says TR5. It has lid and Borla. Nov 29, 2023 · From what I understand these are not great plugs even though they are considered a direct replacement. Oct 11, 2005 · On my trans am i had bolt-ons plus heads and cam and used both TR5's and TR55's couldn't really tell a difference. Aug 26, 2013 · NGK makes the spark plugs for AC Delco which is the OEM brand spark plug. NGK Spark Plugs (U. 111 replacement spark plugs found for NGK TR55. 040). 060). Order quantity of 8 for full set V-Power spark plugs are a patented design by NGK to improve ignitability and reduce quenching. ), Inc. "A TR55 is about a 1/2 step colder " 100% wrong. Good to hear. It let me pick my car - 02 Trans Am - and it listed the following - Any easy way to explain how to get the plug everyone is talking about. anti-sieze? not for me, makes a mess 3. etc. TR5 is stock plug. The tech said the 2007 table is wrong and will be corrected to "TR5". Mar 25, 2013 · TR5 and TR55 are the same plug, just gapped different. Same heat range and all! I use TR55's and use the gap they come with (double check of course - . 060. 059 I did some more research and on sparkplugs. 040" gap IIRC Apr 2, 2002 · The TR55 is an excellent replacement for the stock platnium tip plug. TR5 or TR55 are factory heat range and they are fine to run as well. 0 NGK Spark Plug Specification Chart Spark plug charts are sorted by thread size, thread reach, hex size. He said it was revised. 1969. 050 and the TR5's are gapped @ . A numbering system is also available for NGK spark plug resistor caps. and ignition mfg. 040" gap while the TR55 is . I called NGK directly to clarify this as many seem to think the TR55 is an in-between for the TR5 and TR6; the NGK rep told me this is not the case at all. Thanks Nov 4, 2004 · NGK TR 55's, TR6's, or new OE plugs? Jump to Latest 6. - 1. S. the tr55's are gapped at . the TR5 and TR55 are the same heat range BUT the TR55 has a wider gap, . I run a . Mar 13, 2010 · The NGK TR55 here will serve as the "Standard" plug, and the NGK TR55GP will serve as the "Platinum" version which in fact for you gear heads, the TR55GP is the current replacement to the TR55VX in the 5. 8/6. The one you choose depends on what gap you want to run, since it's recommended to only change the pre set gap by ten thou either way. What would you get? All stock motor. A local auto parts store said the NGK TR5 is the plug for an 03 LS1, not the TR55. I recommend running the TR55's at . I emailed their rep. Use NGK's Numbering Systems to decipher NGK's alphanumeric part system. Apr 2, 2011 · Why the TR55? According to an email NGK sent me, their website incorrectly listed the TR55 for the Corvette. TR6 plugs were recommended by Brandon at Fast Motorsports might I add (who previously tuned the car). May 20, 2011 · What is the difference? Our trucks can use, or suggests a TR5 plug but you guys say use a TR6. #NGKTR55 #SparkPlugs I use the NGK TR55 in my garage queen (2001 Z28, 28K original miles), and the AC Delco iridium plugs in my 04 Tahoe (110k original miles). 35-. I recommend Nology Silver Racing Plugs, Part # G4YS or Brisk Silver Racing, Part # DR 17 YS. 2K views 7 replies 7 participants last post by eviLS6 Nov 6, 2004 E What does gapping and indexing mean for you? Check out this article to learn more about spark plug gap tolerances and indexing for race applications. Jun 27, 2008 · NGK's website says use TR5 (which is factory gapped at . Jan 8, 2010 · TR55 V-Power Spark Plug (3951) by NGK. com FREE DELIVERY possible on eligible purchases TR5 or TR55 By 99yellowz28 in forum External Engine Replies: 14 Last Post: 09-04-2009, 08:01 PM Reading over some posts on NGK V-Power TR55's and nobody's said how long they're supposed to last. Single Platinum - Yes i know that iam beating a dead horse but i will be on vacation soon and during that time i plan on changing my sparkplugs and i keep hearing about the superiorty of the single platinum over copper plugs but many forum members are staying Apr 21, 2017 · NGK is the world's largest supplier of OEM spark plugs Research Applications Prior to Purchase To Make Sure This OEM Part Fits Your Vehicle, Including Engine, Drivetrain and Quantity Needed. mainly AC Delco and NGK. 038 Plug: NGK TR6 (stock number 4177); NGK TR6IX (stock Jan 6, 2009 · Looking for feeback on ONLY L92 or LS3 head'ed cars. 040. Apr 20, 2015 · C5 General - Spark plugs - NGK TR5IX & AC delco 41-110 (i searched) - Sorry to start another spark plug thread. Dec 26, 2017 · Buy Set 8Pcs Ngk V Power Spark Plugs Stock 2238 Nickel Core Tip Standard 0 040In Tr5: Spark Plugs - Amazon. OR Set of 8 NGK TR-55 Spark Plugs for LS Engines - Compatible with all N/A LS engine applications such as LS1, LS2, LS3, LS6, LS7 and GM LS style 1999-2013 Truck Engines. Secure Online Ordering. Bosch and AC-Delco spark plugs. 035 or close to that area. Standard is copper IIRC. 50" and TR5's are at 0. TR55 and they told me that the plugs are exactly the same with the exception of the gap as stated earlier by Y2Kvert4me. The manual on my camaro says gap on spark plugs is 0. I got headers + full exhaust, cold air intake and a custom tune. The TR6 is colder then the TR55 and well suited for high heat applications such as NOS, superchargers etc. The only difference is gap. The results page will display all results for this part number, including partial and exact matches in the part name and number, as well as cross reference matches. 008. This is what they're supposed to be pre-gapped at, but I do recommend checking them prior to installing them. 040) Vs the TR55 which comes pre-gapped at . Jul 15, 2012 · The tr5 and tr55 plugs are the EXACT same heat range as each other, but the tr55 has a larger gap. 040" gap so the correct replacement NGK plug is the TR5. NGK spark plugs offer higher performance compared to standard plugs. Not all plug manufacturers follow the same guidelines. I searched posts re NGK plugs but whats the difference between the NGK tr5(part #2238) and tr55(part#3951)? advance lists tr5s for my truck. I have used the TR-6s on both my Corvettes for years and they have never fouled out. The Tr6 is HOTTER than our stock plugs in our car. 043. 7 seconds the only downfall is you lose about 30 miles in your gas tank i use to get 280 combined highway and street now get 250 on a stock ws6 after all the Aug 28, 2012 · Std NGK plugs that work in the Indmar 350 Vortec are If running a non vortec engine use the BPR6FS NOT the BPR6EFS as the thread is to long! TR5, TR55, BPR6EFS, BPR6EF Generally I use BPR6EFS for carb engines, PZ series for multipoint EFI and IX series for CAT based indmar 350 engines as its more cost effective for the customer to install plat/iridium for the later model engines. Place your order online and pick it up at your local store for free. 040" gap. This is a good thing. I think the gap is smaller on a TR5 compared to a TR55 correct me if i'm wrong. 06 cause the tip can get screwed The heat range of a spark plug determines its ability to disperse heat from the firing tip. They are gapped to 0. Reading over some posts on NGK V-Power TR55's and nobody's said how long they're supposed to last. 36), and the TR55's come gapped at . 3/4. and other mullti electrode gimmicks. TR55's are at 0. Nov 28, 2020 · TR5 vs TR6 Plugs Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Jun 21, 2010 · He handed me NGK 2238 TR5 and said "yeah, i guess they just label them TR5. 057. they run fine at first but always develop cracks in the insulators and then start shorting out causing misfires and hesitation at wot. Find NGK TR55 3951 Spark Plug at LSXceleration with Free shipping on qualifying orders! Apr 23, 2002 · Re: NGK TR55's or TR56's? (C5 YA) TR55's or even better, TR5's, both from NGK are excellent plugs. NGK V-Power spark plugs offer reliable performance and improved ignitability over standard nickel plugs. 40 with shorty headers, wasn't sure if it changed anything. 040 Got a part number? Find your part or other compatible parts from other brands. Plat seems Nov 7, 2012 · Okay debating between NGK tr55 or tr55gp. The TR55 specifically gapped @ . com FREE DELIVERY possible on eligible purchases Oct 14, 2015 · Tr-55s in our camed LS3s Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Aug 2, 2012 · You can see from the NGK spark plugs recommendations the Laser Iridium ITR4A15 and Laser Platinum PTR4B-15 (heat range 4) are one heat range hotter than the standard plug TR55 (heat range 5). You can change heat ranges on racing plugs merely by raising or lowering the last digit. summit lists tr55s for my truck. 060 Plug: NGK TR55 (stock number 3951); NGK TR55IX (stock number 7164); Autolite 764; Denso IT-16 (stock number 5325) Nitrous (one step colder) Heat Range: 6 Gap: . The difference is how they are gapped. 060" gap. 060 gap while the TR5 is ~. 2. I'm usually pretty good at finding things through the search but i got a little confused with spark plugs. Part Specification Listings: All available part specifications have been included in the part details page. Free Returns. 035 but the more I though about it I think I should have gone with 5's. The car should put down around 470WHP to 485WHP. 41, from TR-55's gapped at . TR5=copper TR5GP=platinum TR5IX=Irridium May 20, 2009 · The difference between the GM spec and NGK spec is 67% !!! My question is how does it effect the ignition timing? The way i see it is that a smaller gap will create a lower voltage in the secondary ignition circuit because the electrons in the coil will need to travel a shorter distance in order to reach the ground. com FREE DELIVERY possible on eligible purchases Sep 14, 2007 · in my regal gs I've been running autolite 103 plugs. 035 and the tr55 is gapped at . So why is it a lot of guys use the TR55’s? I plan on getting the TR5 to keep the same stock gap unless someone can tell me why a TR55 would better. If you want to gap your plugs at . 54. What is your spark plug gap? I have NGK TR55's that were . Mar 1, 2011 · The heat range of the TR5 and TR55 are the same. what is the deal with everyone using ngk tr55's in their ls1's? i use denso iridiums which happen to be the best material of all spark plugs and you only change then every 100,000 miles and they increase your 1/4 mile time about . Please consult with head mfg. I emailed NGK and they said the website was wrong. If you are suffering from detonation with stocker or even a cam head car, then maybe you have other issues such as tuning or poor fuel. 44 a piece. Use the site search box to find the part number you wish to see the specs for. what gives?? TR55 is the same (stock) heat range as the TR5. 035 - . 06 from the stock TR5 gap (. TR5 and TR55 are the same heat range. Im only intake and exhaust. Aug 13, 2008 · C6 Tech/Performance - What spark plugs are you all using with the LS3? - Soon I will have a full exhaust, CAI, and tune installed on my 2008 C6. These come with a gap of 0. The TR5GP Platinum plugs are only ~ $3 each. It should be the TR5 gapped at . 060 and I'm having problems in the upper RPM's. Seems the AC range of heat is colder across the board in different models they carry and have a shorter reach. 040, and TR55 is at . TR5 or TR55? - Already read some stuff in search ,but for my application whats the best plugs by NGK V Power TR5 or TR55? I have 2003 coupe,243 heads Cnc'd ,larger exhaust valves,milled to a true 11:1 compression,w/ upgraded valve springs,the package is called a stage 1. Sep 12, 2003 · C5 Tech - NGK TR55 vs TR6 - Most of you stroker or heads/cam guys, which plugs do you use? Is there power switching from TR6s to 55s you think? May 18, 2009 · which one will work better? the ngk tr5 is gapped at . and asked why everyone was using TR55 plugs. Is this the best plug for a bolt on only TBSS??? I want to order some new plugs from Rock Auto (1. My question is what spark plugs are you guys using? 130 replacement spark plugs found for NGK TR5. Trying to close the gap on a TR55 to . NGK V-Power Spark Plugs 3951 TR55 offer enhanced ignition performance, making them ideal for both everyday driving and demanding high-performance applications. Ok so I was just looking up plugs and differences and found a few things that were interesting in comparison to reach lengths and heat range in reference to a few brands. I’m going to put in some NGK plugs and the TR5 is gapped at . for proper gap Feb 5, 2021 · Hey fellas I'm about to do a tune up on my XL. When it comes to NGK spark plugs, you don’t have to worry about sacrificing reliable performance, even when considering heat range. 035 gap. 039 and the TR55 is . Mar 17, 2013 · Which spark plugs are you NA guys running? I'm not a huge fan of acdelco, i know its a stock plugs, but i perfer NGK. NGK 3951 TR55 spark plugs on Camaro SS I have a camaro ss 2014 automatic L99. net LS1 Stock and AFR Thread – 14mm Reach - . but comes pre-gapped at . Jan 10, 2012 · Wow so you kept it. NGK spark plugs feature a V-groove center electrode and concave ground electrode that lowers ignition voltage requirements while guiding the spark to occur between the sharper outside edges of the electrodes for improved ignitability and performance. 708” Socket – 5/8 hex Seat - Taper Stock Heat Range: 5 Gap: . 40 In the past I've always bought V-Power TR55 3951 Did they change part numbers? For reference here is the full list for 06 GTO off of NGK site V-Power TR5 2238 . Jan 20, 2013 · Not sure about the 05' but my 2006 requires a NGK TR5 due to the lower plug gap (. Autozone, Advanced Auto, I dont see an exact match. I would advise you not to use the TR4 plugs on your setup. Sep 22, 2011 · C5 General - NGK TR5GP "G-Power" Spark Plugs - Anybody try these in your Z06? I know a lot of guys like the NGK TR5 or TR55 plugs (only difference is the factory gap setting), but they won't last as long as platinum or iridium plugs. Plug images are located on the opposite page. Click on the "Cross Reference" tab in the header. 059 gap, you better check it to be sure. Thought I would check in for comments on the benefits (or lack of). 059 Click to expand Jun 15, 2009 · C5 Tech - After changing 100 sets of SparkPlugs, NGK TR55 is the standard. Two heat ranges colder non projected tip 125+ shot or 10 + psi . I always like to set my plug gap on a new set of plugs every single time, just to make sure. I'm finding that the ngk 3186 and 3403 part numbers are both referenced to our cars. 40 and not my familiar . Jun 5, 2008 · Re: Difference between UR5 and UR55? I checked the gap on over 20 plugs of each denotation (UR5, UR55, UR6, TR5, TR55, TR6) and NGK is shipping them all with a . Jan 15, 2010 · Yes, that chart is accurate and directly from NGK. Their specialized design ensures that each Spark Plug Cross Reference Chart:: part 3 - NGK spark plugs, Denso, Autolite, Champion, Motorcraft. Nov 28, 2013 · the suffix of the NGK plug refers to the electrod design, the GP being a "Power Platinum" plug. I previously emailed NGK's Tech support about interchanging a TR5 vs. May 6, 2008 · The NGK company website lists the 2005 & 2006 Corvettes with the "TR5" but the 2007 year they list the "TR55" plugs. I emailed NGK and they stated their website incorrectly listed the TR55 for 2005 Corvettes and should be TR5. Many say originally they were told to gap them at . Actual OE or equivalent replacement spark plug. Apr 9, 2025 · Reading over some posts on NGK V-Power TR55's and nobody's said how long they're supposed to last. Search this spark plug cross reference with more than 90000 models. thanks in advance. Now i have seen a few posts that that say iridium isnt any good but they never really elaborated. Last edited by Y2Kvert4me; Jul 30, 2009 at 07:49 PM. NGK does not do 1/2 ranges. but very useful information Spark Plug Info **Note: Heat ranges are determined by NGK standards. Top wjcollier07 Post subject: Re: NGK TR5 vs TR55 Posted: Fri Jun 20, 2008 5:03 pm Certified Bonneville Nut Joined: Thu May 22, 2008 7:08 pm Posts: 5647 Year and Trim: ____ You need TR55,# 3951 TR5s are 0. 055", instead of the usual . Apr 27, 2011 · Hey guys, I did a search, but it's kind of hard to find the NGK threads, as NGK is under the 4 character search limit. It degrades the strength at the weld. They are identical except for the gap, they are the same heat range. 60, so you have to gap them down a lot to put them where you want them to be. Apr 9, 2010 · I just bought some NGK TR5 spark plugs for my 2002 WS6 but not the TR55 plugs. The last digit in an Autolite part number represents the heat range within a plug family. Not going to run motorcrafts or autolites sorry guys. 60, then there was a correction made and it was . the tr-55 which is gapped at . What does the heat range really mean on your spark plug? We have the answers on our training resource page. May 19, 2006 · I have an extra set of NGK TR6's in the garage and I am doing a plug and wire swap on a buddy's car tomorrow. Would it hurt performance? TR5 or TR55 By 99yellowz28 in forum External Engine Replies: 14 Last Post: 09-04-2009, 07:01 PM Find the right NGK V-Power Nickel Plug Number TR5 Spark Plug for your vehicle at O'Reilly Auto Parts. Just wondering if you guys recommend any other spark plugs other than oem. What the differences (if any) between the TR5s and the TR55s? Jun 16, 2007 · The TR55 and TR5 are the same plug. 035". They are commonly used in the 3800 vehicles that require a wider gap. 039 and the TR55 comes gapped at . What part number or heat range are you guys running in your na setups? Sep 30, 2014 · C6 Tech/Performance - NGK vs. The TR5 are designed for a . 50/ea) :coolthumb: and just wondered which ones you veterans suggest. Feb 12, 2012 · "A TR55 is about a 1/2 step colder " 100% wrong. Should I go with TR55 or TR6 spark plugs? May 5, 2021 · NGK. Jun 9, 2003 · What's also strange is that the Autolite 605 cross-references to the NGK TR5-series plug (which seems to be one of the most popular after-market plugs for the C5), yet the Autolite catalogue does NOT list the 605 for the Vette! Mar 1, 2012 · My understanding is the only difference in NGK TR5 and TR55 is the gap, get the TR55's. The person that did the tune said he recommends NGK 3951 TR55 V-Power Spark Plugs. You get too much overhang over the electrode. 040" out of the box. 040" use the TR5 and TR55 if you want a gap ~. 55 out of the box, always have been, which is the OEM gap recommendation for the LS1. They told me the TR5 is the correct plug for the Corvette. Aug 4, 2002 · C5 Tech - NGK TR55 Plugs - Planning to get some of these. If you gap them yourself (and you should) you can save big $$ with the TR5's at ~$1. He did say that they were in the process of updating their specs, and the TR5 and 55 were flagged for correction. I was just wondering if it is a good idea to gap at . com FREE DELIVERY possible on eligible purchases Jun 12, 2023 · I, and most of the racers use NGK TR5 and TR55 plugs. Silver has the best thermal and elecrical conductivity specs. Jan 15, 2009 · NGK Spark Plug Questions. 040 and TR55's = . 035 vs. Aug 27, 2008 · The difference is the TR55 is designed for a ~. The factory spec is . Searching for them online this morning. Engineered specifically for OE applications, the special V-cut nickel alloy center electrode and concave ground electrode of NGK's V-Power spark plug increases ignitability providing quicker starts and smoother idle. Jun 21, 2023 · Page 2- TR5 vs TR6 Plugs Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Plug Maker Other Part No. Then I just searched NGk's site. The difference is the gap out of the box between these two plugs. 035 gap (best plug for most TBSS with tune, bolt ons, cam only) BR6EF- 3177. A. 060") Aug 10, 2009 · Im about to order new plugs for my 01 tahoe 5. com I hadn't heard that Tr55's were extinct. Is there a difference such as gap. Thanks Kelly 23575 Jan 21, 2010 · Not sure about the 05' but my 2006 requires a NGK TR5 due to the lower plug gap (. current plug May 6, 2019 · Buy NGK V-Power Spark Plug TR5 (8 Pack) for CHEVROLET SILVERADO 1500 LS 2010-2013 5. Dec 25, 2018 · TR4 is a HOTTER plug than stock. Same as TR6 but with non projected tip for nitrous or boost . And i dont think NGK makes wires? I use cheap ones for oreillys, Optimaspark i think is the brand of them? Jun 19, 2012 · Sunday, I swapped out the NGK TR55 spark plugs with one heat range colder NGK TR6 plugs in a stock bottom end LS1 C5 Corvette with ported heads, cam, intake, headers, etc, which makes 430whp & 400wtq and has a 10. Jun 20, 2011 · My ported heads are going on his weekend. lksu amannk rffg drnglau yeeab riyf dip ouiv gpcom dnrbl