im just curious to know how many still have the stock oem original 6spd rear and are making 600+rwhp on the track.? i only ask this to narrow down some swaying issues and having trouble staying in the groove goin down the track. mostlikely its the combo of 28" et streets and my 18" radials up front. i max inflated the fronts to 50 psi to help this but still no luck.and yes ,many will say " use the trd rear" . but if it aint broke i dont want to fix it. ill try to bring up the et tire pressure to 24 psi cold and see if that will help a lil and deal with the wheel spin.