XClutch 8" Twin Disc Clutch Kit (Rigid Ceramic) – BMW 135i / 335i (N54, 8-Bolt)

OVERVIEW

An 8 inch twin-disc kit with rigid-hub ceramic discs, built for N54 135i and 335i cars making more torque than a single disc can hold. The smaller 8 inch discs reduce rotating inertia against the 9 inch twins, and the rigid hubs give the most direct torque transfer XClutch offers in this size.

The kit includes a chromoly performance flywheel in place of the factory dual-mass assembly, plus the release bearing, pilot bushing, bolts and alignment tool.

SPECS

• Stage 5 twin-disc clutch kit
• Friction material: ceramic
• Disc hub: solid (rigid)
• Clutch disc diameter: 8 in
• Flywheel: XClutch chromoly performance flywheel, included
• Replaces the factory dual-mass flywheel assembly

PARTS INCLUDED

• Lightweight alloy pressure plate
• 2 x rigid ceramic friction discs
• XClutch chromoly performance flywheel
• Flywheel and pressure plate bolts
• Release bearing
• Pilot bushing
• Clutch alignment tool
• Spline grease

TECH RESOURCES

Additional Parts Required

• None. XClutch supplies the chromoly flywheel, release bearing, pilot bushing, bolts, alignment tool and spline grease in the kit.
• Break-in is required. XClutch specifies driving the vehicle gently for the first 1,000 km (roughly 620 miles), avoiding aggressive launches; low-rpm engagements bed the friction material in properly.
• XClutch recommends inspecting the concentric slave cylinder while the transmission is out and replacing it if worn, since the labor is already committed.
• Professional installation; transmission removal is required.

Installation

• XClutch Technical Service Bulletin TSB-200-2-X (PDF)

Notes

• XClutch's compatibility list for this part number matches its 8-bolt crankshaft N54 kits (production up to January 2009). 2009 model-year cars can have either crank, so confirm your crankshaft bolt count before ordering.
• Rigid-hub twin-disc clutches transmit more drivetrain noise than a sprung street disc, and ceramic friction material engages more abruptly. This is a motorsport specification.
• Price is for parts only; labor is not included.

PART NUMBER

• XKBM20521-2E

VEHICLE APPLICATIONS