Piston Ring Set 4.040 5/64 5/64 3/16

The SEALED POWER Piston Ring Set 4.040 5/64 5/64 3/16 (R934345) is designed for high-performance engine rebuilds and machine shop applications where precision and reliable compression sealing are crucial. This piston ring set is specifically intended for builders working with 4.040-inch bore engines, ensuring the necessary seal integrity to maintain cylinder pressure and reduce blowby.

The 5/64 5/64 3/16 ring configuration includes a compression ring thickness of 5/64-inch, a second compression ring thickness of 5/64-inch, and an oil control ring rail thickness of 3/16-inch. This staggered design optimizes gas sealing while effectively managing oil return and minimizing friction. SEALED POWER rings are manufactured to OEM tolerances using high-strength steel, ensuring proper ring gap clearances and uniform contact pressure across the bore.

Engine builders restoring or modifying 4.040-inch bore blocks, especially those working on big-displacement stroker builds or LS variants, will find this ring set particularly beneficial. Proper installation techniques, including ring end gap filing and piston groove cleaning, are essential for achieving optimal performance and longevity in various load conditions.