Wilwood Thermlock Piston - 1.75" Diameter - 1.05" Length - Fits Sl - NDL - GN III - Lc-GT Calipers 919400 TR-1 is simply the next

TR-1 is simply the next generation of the original chemistries and carries out a tradition of superior performance

Ultra-Duty

Made from 1/8" thick mild steel

Cutlass Supreme 1987-1975

Wilwood Thermlock Piston - 1.75" Diameter - 1.05" Length - Fits Sl - NDL - GN III - Lc-GT Calipers 919400 TR-1 is simply the nextWilwood's exclusive Thermlock pistons to minimize the direct heat transfer from the pads. These pistons can reduce caliper temperatures by more than 30% over stainless steel pistons, without the need for fluid recirculation systems. Fluid temperatures are reduced, seal life is extended, and caliper service life is prolonged with less distortion and reduced wear in the piston bores. Cooler temperatures translate into maximum performance and ultimate