Hey guys have a question... I was gonna buy a set of step cooler plugs since i'm running a 2.9 pulley now. On ZZP's website it says that you can't gap the NGK Iridiums and that they're already set up for higher boost apps.. Is this just plug and play?

 

no dont gap them i went through this already, and i asked the guy who tuned my car if i should gap them and he said not to, so dont and dont listen to some people on here that might and will tell u to gap them

 

Ok kool.. i kinda figured that ... zzp says not to.. It says for 3.0 and below till 2.8 use a step cooler and thats wat i just ordered.. Thx for the input.

 

yeah man thats all u need is one step colder, im running a 2.8 with the 1 step colder and it runs great, im going 2 step colder since i need it for the 2.6

 

Their website is correct. You cannot actually gap iriduim spark plugs becuase they are too brittle and will break. I already have those plugs in my car and they work out great.

 

Iridium plugs suck for boosted applications. They will permit knock more easily which in return is bad for boosted cars. Stick with the regular style plugs, copper being the best but needing replacement more often.