This is a aftermarket Rotax 503 top overhaul kit featuring 2 new pistons assemblies, oem style w/dual rings, pins, circlips , full major overhaul gasket w/ crank seals kit as shown. This set exceeds the MFGs specs , Designed to replace the oem elkos in all respects. These are hard crowned moly coated pistons. See other listing for non coated Smoother running due to better balance, stronger and better heat transfer. We run em in our trikes and use them in our shop for the past 10+ years This is set is for 72.50 bore 503 rotax. .50mm oversize .020". Look at the picture, what u see is what is included.
International orders to certain countries will require that once your location is determined a shipping charge of up to $68.00 will be assesed. We will invoice you for separately after your purchase