JB Racing ULTRA-LITE racing/competition lightweight flywheels have been engineered to produce a very low MOI to achieve the ultimate performance from your "ultra-high performance" competition vehicle. These flywheels are designed with maximum performance as the primary objective. They are extremely lightweight and typically utilize small diameter, single or multi-disc clutches suitable for off-road racing and competition.
JBR ULTRA-LITE flywheels are available in 114mm (4.5"), 140mm (5.50”), 184mm (7.25”), and 200mm (7.875”) clutch diameters and are offered as flywheel only or as complete flywheel/clutch kits (see note 1) for users who prefer a custom pre-engineered package. These special purpose flywheel/clutch combinations are NOT SUITABLE for street driven vehicles.
All JBR flywheels are supplied complete with hardened steel friction surfaces, ignition triggers (where applicable), zero-balanced, and are packaged with a hardened bolt-ring kit containing all premium installation hardware and instructions. All hardware kit materials supplied must be used for proper installation. Flywheels are normally serviceable and can be re-built should they be subjected to abnormal wear, abuse, or otherwise damaged during use.
- Complete CNC machined UL aluminum flywheel
- Racing multi-disc clutch (114, 140, 184mm) by Powertrain Tech
- Performance pressure plate (114, 140, 184mm) by Powertrain Tech
- Throw-out bearing w/ custom JBR bobbin
- Replaceable, hardened steel friction surface
- Pressure plate mounting hardware
- Helicoil inserts installed as required
- Starter ring gear heat shrunk and bolted
- Hardened steel flywheel bolt ring
- Premium 10.9 grade installation bolts
- Zero Balanced
- 200mm Sachs RS versions available by special order only
Fitment:
1992 - 99 E36 3-Series w/ M50/M52 - 6 cyl.
1992 - 99 E36 M3 w/ S50 3.0L, S52 3.2L - 6 cyl.
1998 - up E46 3-Series w/ M52/M54 - 6 cyl., 5-speed trans only (see note 3)
1998 - up E46 M3 w/ S54 3.2L - 6 cyl., 6-speed trans
1996 - 02 Z3 & M Coupe w/ M52/M54, S50/S54 M3.2L - 6 cyl.
2002 - up Z4 2.2i, 2.5i w/ 5-speed trans only (see note 3)
Notes:
(1) ULTRA-LITE Flywheel Kits are also available w/ 3-disc clutch - call for pricing and availability.
(2) This flywheel is designed for Sachs 200mm RCS components. Available on custom order only.
(3) E46 and Z4 applications utilized multiple clutch-hub spline configurations. EXACT year/model must be specified when ordering to ensure receiving the correct clutch discs.
(4) All 2-disc clutch kits (except E46 M3) utilize TOB/bobbin assemby p/n 551-250, 3-disc kits require p/n 551-251. E46 M3 installations require TOB/bobbin assembly p/n 551-252 (2-disc) or p/n 551-253 (3-disc).
(5) All Racing clutch kits require installation of a clutch pedal stop to prevent clutch damage due to overtravel
