My Gts4 came with, hks turbo, power fc, aftermarket fuel pump, 3" kakimoto exhaust, hks plugs, hks filter and 4 balled tyres so i guess it was setup for thrash , perhaps thats why it has a gtr box! Clutch was Gtr when i took it out too , do the gts4's have an lsd, when i do a sharp turn at about 5kph up a hill sounds like i have a locked diff, sounds like one of the rear wheels is moving faster then the other???