I've searched till my fingers hurt and can't find the answer.

I have a set of used JCW rear brakes that I just purchased and will install them the coming week. I just found one of the piston seals is ripped. Does anyone know if the seal is the same as the MCS brakes? As far as I can tell it's a 36mm piston.

Please help so I can rebuild these before installing.

 

the Gen2 JCW rear caliper is the same as the non-JCW, the caliper carrier bracket is different to space the caliper further from the hub since the JCW rotor diameter is bigger. And they're painted red.

 

Thanks, I found this out through lot's of research. The www.realoem confused me because the part numbers are different, I guess for the paint. Found some new seals and rebuilt the calipers, but had a hell of a time getting the pistons to retract even with the tool that turns them to retract. They seem to bind and not turn easily even though they weren't scarred.

Thanks for all your valuable posts, especially about the rear sway bar as one of the best upgrades. Really transformed my car.

 

You're welcome, happy I could help. Glad you're enjoying the swaybar! It was the first thing I did on my car.

One thing to keep in mind, if all you are changing is the rear brakes, because the JCW rotor is bigger diameter you will change the overall brake balance of the car - the rear brakes will have a bit more stopping power while the front is unchanged. I don't know if it is a big enough difference to cause any problems, consult an expert.