Brake Caliper Piston, 1965-1967,1968-1982 Front, For Dual Pin J56 Calipers. New Reproduction (1) Restore your J56 Heavy Duty Brake Calipers To Top Braking Performance. Reproduced with extra thick insulators to avoid boiling brake fluid during hard braking.
Learn more from the following Mid America Motorworks Knowledge Library article:
How to Select the Right Caliper for Your 1965-1982