5/16? maybe ..i think the 1/2 inch needs a new hood for space...i have an 04 auto coupe..so if anyone is selling one let me know..I tried again posting in marketplace but i dont think it let me idk y lol thanksss

 

you have to be a premier member to post in the maketplace.. and the 1/2" will cause you to loose your engine cover but you dont need an aftermarket hood..

I'd suggest the 1/2" just because theres more gain vs the 5/16"

 

ok thanks man..is there a 5/8 also? and r u selling ?