Description Reviews It's surprising to us how many calls we get for just one piston, but we get several. Here is a USED piston out of an R53 MINI Cooper S (Gen 1) that ran out of oil and developed a rod knock at some mileage point. All pistons are inspected for damage and wear. Anything that is questionable is never used. Piston comes cleaned up ready to install new rings and bearing. We also highly recommend replacing the rod bolts at time of install with ARP rod bolts (we use the old rod bolts only to hold the correct rod cap in place). We can get you any of the parts needed to complete this job, like a head gasket, piston rings, or rod bearings. Note: Normally you can only buy these in sets of 4 brand new from the dealer and you will be way over $1000 for the set. Buy these quality used parts and save big!