Chevy LS1 Underdrive Steel Elastic Harmonic Damper Balancer Only (1/2) Speedmaster belt drives represent the

Speedmaster belt drives represent the ultimate in cam timing systems

and best longevity on the market

Instead of spending the time and money refurbishing your existing heads

and hardware

The internal components are made from EN36 material as used in racing

Chevy LS1 Underdrive Steel Elastic Harmonic Damper Balancer Only (1/2) Speedmaster belt drives represent theSpeedmaster K1045 steel enclosed elastic dampers are tested to 12,500 RPM for explosion proof racing application. The "S" shape gap between inner and outer ring is press inserted with sulfated elastic rubber to ensure the damper will not disintegrate under any circumstance. All dampers are tested to withstand 15 tons press force without separation or deterioration.