alrighty, so im picking up a set of NGK 1 step colder plugs and i need to know what gap i should have em at

my mods are: Gm Stage 2 w/ 2.9 Pulley, GMPP Sport Exhaust, ZZP header/dp combo, K&N Cold Air.

 

I gapped my NGK's at .40 and my car liked it.But like what has been stated before,you might have to gap them several times before you find the right gap for your mods.

 

it's different from car to car. mine are at .037

 

Yeah I read many stating anywhere between .35 and .40.


Anyone know what the factory/default gap is on these plugs?

Just had mine installed and I haven't really noticed any difference. I think the mech just put them in as they came out of the box.

 

factory for the ss/sc is:

2005 - .039
2006 - .042
2007 - .040

 

Thx 4 da info....

What about the NGK's, what is their out-of-the-box gap?
Next weekend I'm gonna pull them out and check what they are set at and adjust them to see which gappage my car likes best with these plugs !

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thanks for the help guys, im gonna start them at .40 then decrease slowly if i need to.