The Mahle OE moly piston ring set is listed for Chevy race engines including 400, 396 and 402 displacements and for Olds race engines such as 425 and 455. Intended for race engine builds, these moly rings provide correct sizing for those specific small-block and Olds race applications, supporting engine assembly where those part numbers and sizes are required.
Mahle Rings Chevy Race 400 396 402 Engs Olds Race 425 455 Engs Moly Ring Set