So, I suppose I shoulda posted this thread here, not in the drivetrain section.

So, long story short, I'm doing some brake upgrades, and I'm a bit concerned about pedal travel and MC bore sizes. I've searched for a bit, and have heard mentions of using different MCs - R56 (and how it's not an easy install), similar issues with the E46 M3 one, but possibly the use of a Z4 one.

I've got a 2002 Cooper S, and I'm going to put on some Stoptech calipers. They are from a kit for the 328mmX28mm rotors. I may use the GP2 330mmx26mm rotor with my street pads, but I will likely use their 2-piece rotors eventually.

For the rears, I've got some R56 calipers, and I might get some of the JCW calipers, so that I can use the 280mm rear rotors.

I'm worried that the brake MC is too small, and I'd like to have something on the back burner, just in case the travel is too long.

What's the word on installing the Z4 MC, or one of the E46 ones?

TIA

 

What are the sizes of the Stoptech caliper pistons? Are those calipers from MINI R53 kit?
Stoptech advertizes that its kits are specifically matched for each car model.

 

I haven't measured them yet. I totally agree that since this is a kit or caliper that is meant to be used with an OEM MC, they should be fine. BUT, I was a bit worried it'll be too small.

 

I have the Stoptech kit on my car and it works great