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Formula/organic friction disc has superior holding but with stock-like feel.
The Clutch Masters FX250 performance clutch for the Z4M uses their Formula friction material on one side and organic material on the other. This gives up to 110% more holding power but with near-stock engagement behavior. So it's easy enough to use every day but with extra capacity for heavily modded cars. Clutch Master's advanced pressure plate gives up to 110% more holding capacity without any more pedal pressure than stock. Clutch Masters is the most advanced BMW clutch upgrade on the market - offering more clutch options and design innovation than any other brand.
The CM4 kit uses a non-self adjusting pressure plate that produces a more connected and direct engagement feel. Clutch Masters is the only US performance clutch brand to make their own pressure plates in-house (most other companies use a re-branded Sachs part). Not only does this let them control quality to a very high degree but they are able to design a new pressure plate from the ground up. Clutch Masters re-engineered pressure plate design to introduce their Hi-LeverageTM pressure plate with less pedal effort than other performance clutches. By moving the spring plate closer to the fulcrum point, less force is required to push on the diaphragm springs. Pressure plates are also over-built with extra retention straps and heavy-duty rivets - two of the common failure points on stock clutches.
The FX250 is best used on heavily-tuned naturally aspirated Z4M models. It works best in a sport street, autocross, or light track environment where you want extra grip but the car is still driven often on the street. The hybrid clutch disc has easy engagement so it can be used in traffic and around town. But for dedicated track days the FX350 would be a better choice.
Kit includes hybrid organic/Formula (Fiber Tuff) clutch disc with sprung hub, Hi-LeverageTM pressure plate, HD throw-out bearing, and clutch alignment tool. The sprung-hub disc must be used with a single-mass flywheel (steel or aluminum lightweight).
BMW Fitments:
Z Series E85 / E86 Z4 (03-08) > Z4 M
$590.63
Clutch Masters CM4 FX250 Clutch Kit (Sprung Hub) - Z4M
Formula/organic sprung-hub friction disc has superior holding but with stock-like feel.
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