s13dan
03-26-2005, 06:23 PM
I was just wondering if i need to run a colder stage spark plug if i have my boost up to about 13psi. i have a mostly stock redtop FMIC exhaust ect.. and my stock plugs are 1 stage from the coldest that NGK offers without special order.. what do you guys use? part # would be great..
thanx S13Dan
thanx S13Dan