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BMW 135i/335i Clutch Upgrade for 600HP+: SPEC Stage 3+

If you’ve been following my website, you probably read my detailed post about installing a 335is/550i clutch after my OEM clutch wore out. However, with MMP Stage 3 turbos on the way, I knew the 335is clutch wouldn’t hold as I turned up the boost. With a goal of 700whp, I decided to replace it with a SPEC Stage 3+ clutch and retain my MFactory single mass flywheel.

SPEC Stage 3+ Clutch

When replacing your clutch, I highly advise that you also replace the factory dual-mass flywheel (DMFW) with a single-mass flywheel (SMFW). The OEM-style DMFW is known to create false knock, causing misfire issues at high power. If you aren’t aiming for more than 600HP, you probably won’t need this SPEC Stage 3+ clutch kit, you’d be better off with theĀ 335is/550i clutch upgrade.

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