Regardless of which clutch you buy you should call McLeod and talk to them. I think I talked to Bill and he can explain better than me why we have shifting lock out at high RPM's with the single disc. The twin disc keeps the mass closer to the center line which keeps the centrifugal forces lower.pufferfish said:Jezus! That's a $1600 clutch setup! Talk about a budget killer! Maybe a good single disc and a resurfacing of the steel flywheel is in order?