This Mahle plain piston ring set is specified for a 4.500" bore and includes a 1/16" top ring profile with a .190RW HV385 coated top compression ring per the description. Intended as an OE-quality replacement or rebuild component, the set supplies matched rings for rebuilding pistons in engines requiring these precise bore and ring dimensions.
Mahle Rings 4.500 Bore 1/16in AH .190RW HV385 Coated Top Compression Ring Plain Ring Set