• Lighter weight for faster acceleration and better throttle response.
• No change in clutch feel or pedal effort.
• Durability of clutch to eliminate the unnaturally short lifespan of the original BMW design.
• Quiet operation with minimal gear lash sound.
• Power-handling capabilities suitable for the original hp rating of the V8 or for 700hp+ supercharger applications.
• Readily-available replacement clutch offerings in a variety of materials.

The UUC Ultimate flywheel and V12 clutch conversion solves all of these requirements.

THE CLUTCH:

The clutch draws from BMW's Motorsport heritage and converts the V8 M5 / Z8 to use the 280mm clutch components from the legendary 5.6l V12-engined 850CSi as used in the S6S 560G gearbox. When compared to the original 240mm clutch in the S6S 420G gearbox in the 540i, this is a whopping 50% greater clutch area. This increase in area dramatically increases the clutch lifespan and power-handling capabilities.

In addition to the larger size, this clutch features a sprung hub center section that damps the power pulse variations that cause transmission rattle in standard fixed-hub clutches. Combined with the specific weight of the UUC flywheel, the result is a lightweight flywheel/clutch combination that is rattle-free in most installations (variations in transmission wear, condition of fluid, and other factors may cause some cars to experience very slight rattle).

Clutch options range from standard material rated beyond 500lb-ft, and all the way up to carbon/semi-metallic materials rated beyond 890lb-ft.

Optional clutches include:

• Standard BMW 850CSi clutch kit. Rated beyond 500lb-ft.
• "Performance Organic" clutch kit with higher-rated organic material and high-clamp pressure plate.
  
• "Segmented Kevlar" clutch kit with segmented kevlar clutch material, pressure plate with 26% greater clamping force. Rated beyond 690lb-ft. Due to the nature of the kevlar material, this clutch recommended only for cars that are frequently used in track and road racing venues.
  

THE FLYWHEEL:

The UUC flywheel is the heart of the V12 conversion, perfectly adapting the V12 components to the V8 transmission. Built with the same level of technical sophistication and quality that earned UUC a European Car magazine "Select Gear Top 10" award for best products of 2003, and also the SFI race-spec certification, this is simply the best quality flywheel that can be built. Construction details include CNC machined 6061-T6 aluminum disk with replaceable 1050 steel friction surface (suitable for any clutch material, including race-only sintered iron). Friction surface retaining bolt pattern is computer-designed for optimum strength and load-bearing. Correct V8 starter ring and ignition trigger ring for perfect operation.

HOW WELL DOES IT WORK?

It works flawlessly. Clutch effort is identical to the original V8 clutch, and feel is even better. With the specific weight and sprung-hub clutch design, typical transmission rattle is dramatically reduced or even nonexistent in some installations. With a significant 13.5lb weight savings in rotating components compared to the original V8 flywheel/clutch package, acceleration and throttle response is noticeably improved. This is truly a "no compromise" design, the way the V8 cars should have been equipped by BMW.

Supercharged M5/Z8/540i cars have been equipped with the UUC Ultimate V8 flywheel/clutch combination with excellent results.

COMPLETE KIT INCLUDES:

• flywheel
• clutch disk (specify from options list)
• pressure plate
• throwout bearing
• slave cylinder
• installation hardware

No other parts required for installation.

FITMENT GUIDE

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