Competition race flywheels to suit Jaguar E Type engines are machined from chrome moly steel with an integrally cut ring gear to minimise the moment of inertia. Versions are available for the 104 Tooth ring gear or the 132 Tooth version to allow the use of 7 1/4" (184mm) step fitment competition clutches. The clutch mounting holes are tapped M8 please refer the associated products link below for suitable clutch to flywheel mounting bolts.