portmatch and valve job questions
I'm doing a minor port and port match to my 94 6er from the heads up. i know how to port match but how much gain is there in it? and if i was to do my heads too do i need to get a three angle valve job? how much and where can i get that done? thanks
94 v6 manual, 3.45s w/t-lock, cai, straight straight through dual exhaust, sct eliminator.