Chevy LS1 Underdrive Steel Elastic Harmonic Damper Balancer Only (1/2) ensuring a perfect fit and

ensuring a perfect fit and maximum efficiency

These guides are offered in a variety of diameters to suit your application

horse power increase of 10-15

street rod and marine applications

These crankshafts feature profiled aero-wing counterweights and have straight shot and chamfered oil holes

Chevy LS1 Underdrive Steel Elastic Harmonic Damper Balancer Only (1/2) ensuring a perfect fit andSpeedmaster 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.