I just got my zex kit installed a few days ago , have not used it because i need plugs. I have heard that people are using ngk tr6, and autolite #103. BTW it is a wet system and i do know that the plugs need to be 1 heat range colder. Which plug would you recommend before the other. Any help would be appreciated

Also what did you gap the plugs at?

i use TR6. i gap mine at .039



Im a Xbox 360 fanboy...and damn proud of it!!

I am notrunning nitrous @ the moment, but I run Bosch Platinum + 4's, I swear by them and so do many of my freinds.



My Cav
I give up...
i'm buying a VW those people love trees, so they should love eachother too... "Andy"

DO NOT RUN PLATINUM PLUGS WITH NITROUS.

Iridium, copper, resistor.... are all fine.


My Car

Autolite 103's are a little shorter than stock. Ive never had a problem, or misfire gapped at .032. And the price is right at like $2 a piece. I have a turbo not nitrous but should be good for you.

i just bought my autolite 103's, what should i gap them to?

i got a sig warning
boosted cavfire

i wouldnt do iridium for boost or n2o. you should use copper. iridium still burns hotter than copper. and heavens no, dont use plats.
.38 gap is fine. autolite 103 or ngk tr6 are the correct heat range.

i have 2 sets of tr6's that im willing to part with.. hit me up on im or send me and e-mail...


Memeber since 4/2002
Premium since 1/2005
Garret t3 turbo charger for sale.. $65 plus shipping
e-mail for more info

hehehe...i just installed a set of 103s at the track last night. good plugs so far. no more lead buildup on the plugs. i gap mine at .027...but then again i was running 15PSI and i wanted to make sure i had the best spark possible. tomorrow ill open them up to .030 or .032



I used to race cars, now I race myself.
5K PB: 24:50
10K PB: 54:26

I'm about to drop down to NGK Tr71x's! 2 drops colder than stock, step up from the Tr6's!

Autolite 103's
NGK Tr6's
NGK Tr71x's

all I know of so far!


N2O + Bolt-ons = 220Hp/250Tq

Coming Soon:HpTunersPro, EagleConnectingRods, WiescoPistons, 13sec2200

i tried those already man...they foul out fast as @!#$. especially if your running rich AT ALL. my car hated to idle with them and it hated going full bore on them even more



I used to race cars, now I race myself.
5K PB: 24:50
10K PB: 54:26

The Tr71's? Hmm, that's interesting! I had them installed before but passed them off to a guy spraying direct-port on his 2.4! He swapped me out with his stock plats and I gave them those. Karo had already shipped me out two sets of Tr6's when I bought the nitrous off of him so I was ok for nitrous use.

I used them for atleast a week before I swapped the guy for them. Guess that wasn't enough time to tell the tale but for a week they were golden! I used 89-oct shell / NGK Tr71's / on a 75shot. I opted not to use the purge on my set-up to have a gradual increase of nitrous instead of a sudden burst to stay away from any mis-haps. That's weird that you say that though Hypsy, I dont have them anymore to butt heads with ya but to the original post, just stick with the Tr6's and Autolite 103's haha!


N2O + Bolt-ons = 220Hp/250Tq

Coming Soon:HpTunersPro, EagleConnectingRods, WiescoPistons, 13sec2200