dragging brake
 

One of my front brake calipers has a dragging piston and Porsche does not offer the seals for the pistons, all you can buy from them are the ‘dust cover seal kits’

Do you know where can you buy the seals for the Brembo pistons?

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Check rockauto and look under the Brake/Wheel Hub category for Caliper Repair Kit for Porsche Boxster. That may be what you are looking for.

I had that problem last year and used the Cup Car solution: Just cut off all the remaining toasted and carbonized dust seal material that may be interfering with piston movement. Problem solved. Cup cars don't have dust seals because they overheat easily doing track work and get in the way.

Stop Tech may have the Brembo seals but you probably don't need them. Toasted dust covers are the enemy #1.