GM Performance Parts Piston Oil Ring Set, 4.000" Bore, Low Tension, Small Block Chevy (604 Crate)

Piston rings operate in a very explosive environment, so they have to be extremely tough. Chevrolet Performance piston rings are premium quality and factory-tested to withstand the rigors of high-performance street and competition engines. Available in multiple designs, ring materials, and coatings, they are matched to specific engines and applications to exceed the ever increasing demands of today's most advanced vehicles.