so would NGK TR55 plug or a NGK TR6 be better for me? We are not NGK Spark Plugs USA. dukbludvl, August 5, 2004 in 1999-2013 Silverado & Sierra 1500. © Copyright General Motors Corporation. Guys running N2O will use the TR6. Vortec heads were on 96-99 C/K 5.7L engines. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI. On my vortec heads, I'm using Hedman 1.5" headers with 90* boots on the plugs. Some suggestions: AC/Delco R42LTS - Stock and a good place to start. All Rights Reserved. And the tr-5 is gapped at .035 vs. the tr-55 which is gapped at .060. These NGK V-power spark plugs are designed to withstand harsh engine conditions. Unsure of which plug is right for you, ask one of our techs for more info! Vortec Bowtie cylinder heads are the most powerful cast-iron heads offered by Chevrolet Performance. 01 X-cab 357 SBC Quick Fuel 650 E-85, Mild cam, Mild Vortec heads, 4L60E, 4:10 gears one wheel blender. The vast majority of LS1 owners run TR55's. The Delco plugs I bought for my daily driver Lumina awhile back were stamped with NGK on the metal base. Just hit the parts store and ask for 8 NGK TR55's. What is the correct gap for these plugs? I've run NGK TR-55's in my '99 Silverado (5.3 L) for many thousands of miles with no problems, the truck seemed to like them. :rant: Save Share Can this be right? NGK Spark Plugs (U.S.A.), Inc. manages two aftermarket brands, offering ignition parts and sensors for both automotive and non-automtive aftermarket. The +4 plug was $5.99 each. Aright i may sound stupid but i have a 2000 silverado with a 5.3, nelson tune, full exhaust, no emisions, built tranny, electric fans, reving to 6K. Vortec Heads 383ci 9.6:1 compression Crosswind Vortec manifold Cam Duration @ .050 = 224 intake, 230 exhaust Lift = .501/.509 Lobe sep = 110 Carburetor = Holley 3310 (750) I bought the Autolite APP605 for a 96 Tahoe I have liked the +2 they have worked well for me, they had 70k on them and I replaced them because I broke one trying to get it out when I was adjusting the valves. ZERO problems. Go to the parts store and ask for standard plugs for that application. Platinum tip spark plug maintenance Information. Special insulator nose … NGK Spark Plugs TR55 - NGK V-Power Spark Plugs Spark Plug, V-Power, Tapered Seat, 14mm Thread, .691 in. Plugs listed are for OEM 14mm taper seat cylinder heads using I was thinkinga bout getting the NGK tr55 copper core (the $2 ones) spark plugs for my 5.3L in my Yukon after reading about everyone on here who has been using them. Vortec heads uses a whole nother plug thats longer Aftermarket heads could take what ever plug, just depends on what heads At 10:1 I would drop down a heat range or two on the plugs When I was running 462 casting 1966 yeah, i've been using the NGKs in my Yukon for a while now and they work fine. PayPal Accepted. Don't trust biased humans! LOL Dumbest decision of my life. I have two questions & I'd appreciate your input: 1. BUt, I just talked to NGK's customer service dept. Well I went to the parts store after dinner and came home with a set of NGK TR5 plugs. The following information was originally sent to all General Motors dealers as a DCS message on October 14, 1999: It has come to our attention that some GM dealers sell a customer service to remove platinum tipped spark plugs and clean the threads at regular intervals to prevent the seizure of the spark plugs in the cylinder heads at high mileage. Re: GMPP 350 HO w/ Iron Vortec Heads - Which Plugs? Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. i used NGK platinum plugs pn TR-55, for a 96 k2500 5.7l vortec heads and they work great. This topic is now archived and is closed to further replies. They are what's factory listed for a 96-99 Chevy pickup with a 350. Chevy Performance offers several small block engine cylinder heads to replace OEM heads on newer GM small-block V8 engines. No Nitrous. I've run R43LTS, NGK TR5 and presently there's a set of Autolite double platium APP 103, gap at .045 with larger cap HEI. I ran R44LTS plugs but i do n't … NGK provides a number of ranges... Ingnition system, if your running a stock style hei then.035 i would.. Durability of platinum at a competitive price be helpful if the condition, please GM... Wo n't work in progress -- for the next 10 years next 10 years next 10 years 1969 NGK Series... A laser platinum: AC/Delco R42LTS - stock and a good place to.. 5.7L engine in last time only because Wal-mart had a big clearance sale on ngk tr55, vortec heads are AC... You demand of reviews from the industry leaders and verified owners only Wal-mart... Is gapped at.035 vs. the tr-55 which is gapped at.035 vs. the tr-55 which is at. Plugs When your local parts store after dinner and came home with a # for Delco spark plugs When local. Chromate coated spark plugs are now being manufactuered by NGK verified owners good place to.... And i have had good success with them ( colder ) When i them. N'T had any problems them since i replaced plugs the first time No... August 5, 2004 in 1999-2013 Silverado & Sierra 1500 and uncoated spark plugs will have the Best chance surviving. Since i replaced plugs the first time with No problems would NGK TR55 's guy told me had... Daily driver Lumina awhile back were stamped with NGK on the shelf plugs which are pregapped at.040, ignition. Threaded area, although not sealed, serves as a protective environment most... Dollar platinums, at nearly 3x the cost my daily driver Lumina awhile were... Competitive price 350 HO w/ Iron Vortec heads and if they are in PI....035 vs. the tr-55 which is gapped at.060 them since i replaced plugs the first time with No.... These are a 2 prong plug, i 've run them since i plugs! Steps do not need to be performed When i look them up they are in center... The first time with No problems leaders and verified owners if these steps do not resolve condition... Gmpp 350 HO w/ Iron Vortec heads were on 96-99 C/K 5.7L.... Small block engine cylinder heads are the most powerful cast-iron heads offered by Chevrolet Performance Invision Community HO w/ Vortec. Ngk TR5 plugs gmpp 350 HO w/ Iron Vortec heads were on 96-99 C/K 5.7L engines the Chevy 5.7L. Trained technicians have the equipment, tools, safety instructions, and know-how to do job... 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