Clutch Masters FX725 Twin Disc Clutch & Alum Flywheel Kit - E82 135i/1M, E9X 335i, Z4 35i N54/N55

The Clutch Masters FX725 kit is a light weight and highly capable clutch and flywheel package for mixed track and occasional street use on -1/2009-2013 E82 135i and E9X 335i with the N54 or N55 engines. The entire assembly weighs in at only 18lbs!

Twin Disc Clutch & Flywheel Kits were originally developed for muscle car drag racing - extremely high torque and hard launches. The materials used in the CM FX725 and FX850 clutches are able to hold a lot of torque (much more than any naturally aspirated BMW will produce) and will stand up to a lot of abuse. This also makes them ideal for drifting and clutch kicks where strength and quick engagement are critical. The pressure plate design in a Twin Disc eliminates the drive straps used on a traditional clutch, which is the most common failure on drift clutches.

Twin Disc clutches also offer cost savings in the long run. Not only do the clutch materials and pressure plate hold up better under extreme conditions but the consumable cost is lower than OEM and sport Clutch & Flywheel Kits as well. Clutch discs and friction plates are typically under $200 and they can be replaced without the need for special tools.

Features of the CM FX725 kit:

• 7.25" Twin Disc setup reduces weight without giving up friction surface
• Ceramic/ceramic clutch discs - extremely high torque rating
• Stronger and more reliable billet aluminum cover (does not use failure-prone drive straps)
• 6061-T6 aluminum flywheel
• 18lb total weight - improves throttle response and reduces driveline loss
• Upgraded throw out bearing included
• Cost effective and replaceable consumable items
• Made in USA

Clutch Masters is at the forefront of clutch design and technology. This Twin Disc clutch for the N54/N55 135i/1M, E9X 335i/335is, and Z4 35i blends advanced friction materials with race technology to give you a clutch upgrade that keeps pace with your upgrades. This track/race/drift Clutch & Flywheel Kit uses two ceramic clutches to achieve very high torque ratings but do not tolerate clutch slippage. They are designed to hold tremendous horsepower and torque without much regard for smooth engagement. This makes them unsuited for street use. By increasing the clamping force of the pressure plate and adding to the square inches of usable disc area, CM Twin Discs significantly increase clamping values with an average of 50% increase in pedal pressure depending on the application (pedal pressure only seems high because of the ultra-light stock clutch feel). The clutch cover assembly is CNC machined billet aluminum with 25% more tensile strength than the competition’s cast unit. CM covers do not use straps so a known weak point on OEM clutches is eliminated.

The 9lb flywheel is machined from billet 6061–T6 aluminum to meet SFI spec 1.2 for competition in NHRA, SCCA, and NASA. This is a single-mass flywheel that will replace the failure-prone stock dual mass. More noise and chatter is to be expected given this kit's intended use and design (but we found it livable). Clutch noise will improve after the break-in period. Each aluminum flywheel includes a replaceable friction surface. Steel flywheels are also available on select applications that have less noise and better drivability.

Available Stages:
“Street and Race” (TD7S) – 1 ceramic rigid disc, and 1 fiber tuff rigid disc
“Race” (TD7R) – 2 ceramic rigid discs

Because of the ceramic material we do not recommend using this clutch for any street use. If some street use is planned, consider the Ceramic/Fibertuff Twin-Disc kit instead.

To read more about clutch design and selection, read our Tech Topic page by clicking here.