i have a 2004 sti. i have a friend with a 5.7 gto and when i was stock and he had a intake a true dual full exhaust with now mufflers. we went from a 20 roll so i didnt murder him off the dig, i had him intil about 110 then he started pulling on me. then i got a perrin lightweight pully and a turboback exhaust and now at like 80mph in 4th i pull as soon as i touch the throttle.



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