I Had a 6-puck ceramic clutch in mine. It would grab like all shit and never a hint of slipping with plenty of hard launches. However it was a real pig to drive because it had almost no slip, wich isn't the best thing for a AWD. took me a week to learn to drive with the bloody thing, I just kept stalling. there better in 2WD's cars because when they grab it will just break traction slightly then take off. Now I've got a cushion button ( About $800 - $900 fitted from memory). It isn't as tough but its much more driveable. A mate of mine has one like my old one in his Skyline GTR and he loves it but there AWD setup is very different to the Rex's.