Chevy GM LS LS1 LS6 UnderDrive Fluid Damper Harmonic Balancer SFI 18.1 Speedmaster forged standard weight crankshafts

Speedmaster forged standard weight crankshafts are designed for street or race engines with substantially increased horsepower

measuring 92mm

the use of 6 pinion gears means the stress on gears is spread over a greater surface area

They accurately measure camshaft centerline

Chevy GM LS LS1 LS6 UnderDrive Fluid Damper Harmonic Balancer SFI 18.1 Speedmaster forged standard weight crankshaftsUsing only three parts a laser welded sealed housing, an internal inertia ring, and highly viscous silicone fluid between the two these SFI approved Fluid dampers can control all crankshaft vibration, not just a limited frequency range. As a result, you get reduced wear on the main bearings and timing gear, more stable valvetrain operation, and less chance of crank failure.