Would i get much of a gain from switching my gt-40x heads out for some AFR's. and if so, would i be best off with 165's or 185's??
p.s.- keep in mind that i will also be porting my lower intake, and adding about a 100 shot of nitrous
p.s.- keep in mind that i will also be porting my lower intake, and adding about a 100 shot of nitrous