I've used many different types of pads, DTC60, XP10, DSUNO, ST43, ST47, RC6, along with Amsoil brake fluid. the brake pedal often get soft towards the end of the day.

i picked up these RB stainless pistons and seals from my sponsor.
ss pistons - http://www.shop.motorsportsperforman...per-BM-41P.htm
seals - http://www.shop.motorsportsperforman...rs-BM-41BS.htm

OE 46mm pistons = 0.18 lbs, RB SS = 0.225 lbs; .045 difference
OE 40mm pistons = 0.14 lbs, RB SS = 0.19 lbs; .05 difference

that's a total of 0.19 lbs (1/5 lbs) difference for all four pistons for one caliper.






oem dust seals all burned and cracked


opening up the calipers


caliper split in half


oem pistons next to stainless pistons


use compress air at the bride port and a used pad underneath to prevent one piston from coming out complete and not allow the other one to come out.


remove the oem dust seals


remove oem piston seals


clean out caliper


new stainless pistons and dust seals ready to go in


lubricate the pistons with some brake fluid so they slid in easy


all four pistons are in and ready for reassemble


i'll be at Watkins Glen next weekend for NASA TT to try them out first time on track. wanted to try them at Summit Point this weekend but my turbo didn't get back yet.

Very interested to see how these will hold up compared to the OEM's.

Nice write-up with great pictures!

Very nice!

I need to replace my boots and seals here soon, too.

Hmm...I have the Brembo seal kit already. Do you think it'll work with those pistons? Or is the kit you linked specific to them?

these stainless pistons are designed to work with OEM seals, so your brembo seals kit should work.

Nice! I think I'll definitely pick these up then. Thanks for the write-up

^ would help me out if you pick them up from my sponsor

interesting.. ive never rebuilt calipers, but im curious what did you mean about using compressed air and placing the pad underneath?

The pistons come out very easy when you apply compressed air into the bleeder nipple hole or the banjo bolt hole.

if you don't put something under the pistons to prevent one from coming out completely, then the other one wont come out. the pistons will be almost completely out, you'll just have to wiggle them to get them out all the way

thanks for the heads up... i want to redo my brembos and this seems like a great rebuild for after coating

Very interesting, looking forward to feedback after your next day at the track.

Nice! Why did you split the caliper? You don't need to do it for replacing seals & pistons.

^ it's easier just to split the calipers. it's not that much more work. are you done with track this year.

Alwayshelpingoutthecommunity.

Nice write up, B!