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If you have 13" diameter front rotors, then you have the J55 (HD brakes), and the GS calipers will bolt right up. BTW, If you already have the J55 brakes then the switch to GS calipers will be a marginal (if any) improvement in stopping power.
BTW, If you already have the J55 brakes then the switch to GS calipers will be a marginal (if any) improvement in stopping power.
I agree, if you have the J55 you already have the 13 inch rotors. There is the idea that the GS caliper is of a stiffer design than the standard 13 inch caliper. I would guess that you wouldn't see a diff though. If you don't have J55, you will need the rotors, caliper brakets, and calipers. Also make sure you brake lines are long enough, some people run into problems with the stock 12 inch brake hoses..
BTW, If you already have the J55 brakes then the switch to GS calipers will be a marginal (if any) improvement in stopping power.
I have the baer 13" slotted rotors with the later 2-piston calipers on my street driven '86 but I have no idea what the calipers came off of. How do you tell the difference between GS and the other 2-piston calipers?
Easiest way to tell the difference between the standard J55 calipers and the GS calipers is that the J55's are unfinished aluminum, and the GS's are painted black.
The "GS" calipers were factory on both the GS and the CE in 96. Front & rear are black, and they have the word "Corvette" in silver. They take the same pads as the regular J55 aluminum calipers. Some say they are stiffer, and some say the aluminum J55 calipers with more & thinner fins cool better. Only the shadow knows..... :flag