Chevy LS1 Underdrive Steel Elastic Harmonic Damper Balancer Only (1/2) and the reverse lockout mechanism

and the reverse lockout mechanism eliminates the chance of transmission damage from accidentally shifting into reverse

street rod and marine applications

horse power increase of 10-15

ensuring a perfect fit and maximum efficiency

Chevy LS1 Underdrive Steel Elastic Harmonic Damper Balancer Only (1/2) and the reverse lockout mechanismSpeedmaster 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.