Answer I own a trans am with 310hp When I bought it from the dealer They offered a performance package in which they modified the computer settings for it to perform as if it were Ram Air it costed 3500 at the time Also upped the revs With the button on It revved 7000 My Friend owns a Trans am that is 275hp Mine is significantly faster and was able to beat his by a car lenght minimum But I don t know about the 340hp any1 there to help