This is a high quality piston set manufactured by Federal Mogul (USA). It fits Mitsubishi L300 with 4D55 and 4D56 engines. It replaces Mitsubishi part numbers MD050021 and MD103318. This set comes in standard size, .50 mm oversize and .75 mm oversize. It comes complete with four pins and eight circlips. These pistons use non-tapered 4D55/4D56 piston rings.