Just an fyi, but i gained 53rwhp and 86rwtq from an L pulley alone!! My chip got me 29rwhp and 40rwtq! I need to get redynoed though because my plugs where blowing out from the xtra boost! to wide of a gap
Also make no mistake it only takes a few mods to get a ls1 into the 12's consistantly! which is right where the 03 is stock! sounds like a good race!! get a catback, Pulley, chip! 3 best mods for the $$. you won't believe the SOP difference! lightly modded ls1 will be a thing of the past
Leon