Competition Clutch flywheels are made of 4140 forged steel and are a one-piece design.
This helps significantly in reducing the chances of ring gear separation and friction surface warpage that occurs with aluminum flywheels.
NOTE: This is a B-series lightweight flywheel that accepts any standard B-Series single disc clutch kit, drilled for a D-series crankshaft. For use with plate less D2B conversions (using a B-Series transmission on a D-Series engine).