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Hello everyone, I would like to ask about the front brake calipers for C7 Z51 which is 4 pistons for one. It can be change to 6 pistons like GS or ZO6 with ceramic brakes disk directly or it must be change the brake backing plate too
As X25 notes, you will need at least a 5 mm spacer on the front wheels to clear the Z06 - J56 calipers. You will also have to replace the front brake lines, the J55, Z51 lines are not compatible with the J56 Z06 calipers. Make sure to order new caliper mounting bolts, or order 14 MM Nord Lock washers.... (another tip from X25). Lock tite is not adequate for the heat levels, the bolts/threads will experience during a 30 minute track session.... I just changed my front Z51 calipers over the new J56... Much more confident braking at the track. If you buy stock Z06 GM brake lines, the change is probably easier, if you choose Stainless Steel Braided lines, like the Goodridge ones I purchased, be prepared for some "frustration" the end that connects to the hard steel line on the C7 won't fit through the hole in the chassis bracket that supports the line at the junction between the steel and the flexible line running out to the caliper. I put my new SS lines in a vise in the shop and filed the required 3 flats so it would fit into and stay locked in the bracket. Had to file 3 flats on the round Stainless Steel fittings provided by Goodridge on their lines. The lower portion next to the black rubber sleave has the correct flats which correspond with the brake line brackets on the frame rails of the C7 but they don't machine those same flats on the "threaded" fitting.... Bummer.
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Front brake calipers C7
