911JoeC2

Sending calipers out to be refinished and the piston boots were fairly brittle. Not all of them, but I figure I'd just replace them all while the calipers are out. Does anyone know what sizes these happen to be? Dealer is guessing, as is Pelican Parts even after I provided my VIN. Last guess was 38mm fronts and either a 28 or a 30mm in the rear, depending on where/when Brembo manufactured them.

badabing

Call Girodisc

Dave in Chicago

Puzzling that dealer would have to guess. I've always gone by the Porsche Parts Catalog for such items as brake piston sizes. I think this is the link to download by model. I found it curious that the rear brakes are from 944 Turbo.

https://www.porsche.com/usa/accessor...artscatalogue/

Good luck.

911JoeC2

Thanks, Dave. If you look up a lot of the sub parts on these Brembo sourced brakes, you'll see many interchangeable models with variations in piston and brake pad sizes dating back a bit, so I was surprised, as well.