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We have a C3 in the shop here in the UK, with modified front ( and probably rear) calipers. Stainless steel liners with alloy pistons with O ring seals.
How do I find out which modification they are, and where do I get new seals and pistons?
You will be hard pressed to find brake calipers for the C2-C3 Corvette that do not have stainless steel sleeves in them these days. It was a modification that started in the early 70's due to the composition of the calipers and their propensity for pitting. The "O-ring" mod came along somewhat later to address the problem of the original lip seals pumping air into the brake system when rotor runout exceeds about .006".
C3 Calipers
