Thankyou Erich. Sorry gentleman I only speak English. I purchased some E32 750il 4 piston front calipers a while ago and one of the pistons is pitted about 40% from the bottom. I tried to clean it up but it's pretty bad. I need to replace one of the the 44mm diameter pistons. I purchased the rebuild kits that only came with the rubber seals, but the rebuild kits do not come with the pistons. Where can I purchase one 44mm diameter piston from?
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