XClutch Stage 2R Ceramic Race Clutch & Chromoly Flywheel – BMW 1M / 135i / 335i (N54/N55)

OVERVIEW

The Stage 2R is XClutch's race-oriented single-disc kit for the 24566 pattern — the E82 1 Series M and the N55 135i and 335i. A ceramic race disc replaces the organic friction material of the Stage 1, raising heat and torque capacity for track and high-power street cars at the cost of a sharper, less progressive take-up.

The kit ships with a chromoly performance flywheel in place of the factory dual-mass unit, along with the release bearing, pilot bushing, bolts and alignment tool needed to complete the installation.

SPECS

• Stage 2R single-disc race clutch kit
• Friction material: ceramic race compound
• Flywheel: XClutch chromoly performance single-mass flywheel, included
• Replaces the factory dual-mass flywheel assembly
• Higher heat and torque capacity than the Stage 1 organic kit
• Supplied as a complete kit with release bearing, pilot bushing, bolts and alignment tool

PARTS INCLUDED

• Pressure plate
• Single ceramic race friction disc
• 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-214 (PDF)
• XClutch Technical Service Bulletin TSB-226 (PDF)
• XClutch Technical Service Bulletin TSB-SMF02 — single-mass flywheel (PDF)

Notes

• A ceramic race disc engages more abruptly than an organic street disc and transmits more drivetrain noise. It is not the right choice for a car driven mainly in traffic.
• XClutch does not publish a torque rating for this kit. If the rating is decisive for your build, contact Speed Logic before ordering.
• XClutch lists this part number against the 2011 1 Series M and the N55 135i and 335i. Confirm your build date and crankshaft bolt pattern before ordering.
• Price is for parts only; labor is not included.

PART NUMBER

• XKBM24566-1R

VEHICLE APPLICATIONS