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Xtreme Clutch 230 mm organic twin-plate clutch kit for the listed BMW M135i (F20). Supplied with a matching single-mass flywheel for high-power street applications. Rigid organic discs give a more direct engagement than a standard single-plate clutch.
FITMENT
BMW M135i (F20), July 2012–February 2015
Engine: N55 B30 A 2979 cc, 235 kW
For the listed manual-transmission application. Confirm gearbox type, input spline, crankshaft mounting and release arrangement before ordering.
SPECIFICATIONS
Part number: KBM23597-2G
Construction: 230 mm twin plate
Friction material: organic
Input spline: 26 teeth, 35.0 mm diameter
Supplier-rated torque capacity: 1200 Nm
Included flywheel: single mass
Flywheel step: +3.8 mm
Disc hub: rigid
Supplier stage: 4
PURCHASED PARTS PACKAGE
Single-mass flywheel, two organic friction discs, intermediate plate, main pressure-plate casting, clutch cover, release bearing, bolts and alignment tool.
INSTALLATION AND USE
Follow the fitting and bedding-in instructions for the exact kit. Check installed clutch height and release clearance before use. The clutch torque rating does not establish a safe limit for other drivetrain components. Inspect the clutch fork and pivot ball for wear before fitting. The floating intermediate plate can rattle when the clutch pedal is pressed; this is an expected characteristic of this design. Follow TSB-166 for assembly sequence, disc orientation and installed-height checks. Single-mass conversion can increase gearbox noise at idle or under low-speed load. The release bearing must be fitted in the orientation shown in TSB-214.

Xtreme Clutch 230 mm Organic Twin-Plate Clutch Kit with Flywheel BMW M135i (F20) KBM23597-2G

