Dun worri Des....
From UUC....
1) We've put literally hundreds of our flywheel/clutch setups in E46 M3s, and a large quantity in SMG-equipped cars with zero problems.
It is 100% compatible with SMG, and in fact is used in some heavily customized SMG M3s with forced induction and we now private-label our current setup for some European tuners.
2) For those with our original flywheel that used a "locked" self-adjusting clutch (SAC) pressure plate from SPEC, we now offer a proprietary-design direct-fit replacements that feature an all-new non-SAC pressure plate available in any surface facing you need.
This direct-fit non-SAC also fits the OE M3 flywheel, or any aftermarket unit using a standard M3 clutch setup.
We fit a sprung-hub center to this, so you can convert whatever "other brand" flywheel you have to a reduced-rattle sprung-hub fitment with greatly enhanced power capability and reliability.
- Rob Levinson
UUC Motorwerks
'Clan Master'