IMPORTANT AUCTION INFORMATION - PLEASE READ: Piston rings are precision parts that must be ordered sized properly to their corresponding bore. Please double check your size needed by measuring or seeing a qualified machinist to do so IE: STD, 020, 030, 040, 060 etc. While we do accept returns, we will deduct from refund to cover loss if the returned item is opened, used, or damaged due to ordering the wrong size or improper installation.