I'm going CT SC and would like to know what others are doing with thier plugs. I've heard that at about 300hp it is recomended to move down to a colder plug. I'm going to have 290 - 310 whp now with this kit. So are the guys running factory plugs still in this power range or should I get the next colder? what do you guys recommend?

Thanks guys

 

NGK 7173 gapped to .030"-.035"

 

yes 1 step colder is preferred.

 

Ok thanks guys

 

So less then stock gap works better for my application? Stock is 44 right?

 

Gotta agree NGK 7173's are thee way to go. I have been gapping to .032.