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      12-26-2017, 08:19 AM   #2
deansbimmer
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Drives: 2011 E93 M3
Join Date: Nov 2014
Location: DFW, Texas

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The aftermarket likes to note what a big upgrade it is to "twin disc" but that's just their marketing department talking since the original is twin disc carbon/organic to begin with. Slightly misleading of them...

There is no need to replace the OEM clutch to handle superchargers, OEM will handle Stage 2 SC's. Stage 1 won't sweat a factory clutch.

With the SPEC kit you're mainly paying for the upgraded flywheel. Since your 08 likely has the older setup the SPEC is going to update the entire assembly and give a *slight* performance edge over the original. Driveability/pedal feel won't really change much.

If your clutch is aging then I'd go with the SPEC.
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