This kit is designed for replacement of worn or damaged components in the engine cylinder assembly.It includes a cylinder, piston, piston ring set, 15mm wristpin, two circlips, cylinder base gasket, cylinder head gasket, tensioner gasket, and two valve stem seals.The cylinder has a standard bore diameter of 65.5 mm.The piston pin measures 15 mm x 47.5 mm.The kit is compatible with models including 250SZ (2023–2024) and 250Z (2014–2017).The cylinder and piston are made from aluminum.Color: Black.Package contents are limited to the items listed above. This is an aftermarket accessory.Brand names and model numbers are referenced strictly for compatibility information.