Chevy GM LS LS1 LS6 UnderDrive Fluid Damper Harmonic Balancer SFI 18.1 They feature greater strength and

They feature greater strength and durability

These Speedmaster crankshafts are made from the same strong aircraft-quality forging as standard-weight cranks

Flat surfaces are finished with CNC machine center for accuracy and smoothness

This is a preloaded unit allowing for a faster reacting unit

from mild to wild

Chevy GM LS LS1 LS6 UnderDrive Fluid Damper Harmonic Balancer SFI 18.1 They feature greater strength andUsing 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.