Piston Ring Set 3.771 .043 .043 3.0mm

The Piston Ring Set 3.771 .043 .043 3.0mm by MAHLE PISTONS is designed for high-performance engine builders and machine shops looking for precision-fit piston ring solutions specifically for eight-cylinder applications. This file-fit ring set is essential for achieving exact bore matching and optimal compression sealing in custom and rebuilt engines where standard tolerance rings may not suffice.

Featuring a 3.771-inch bore diameter, this ring set includes dual compression rings and an oil ring with thicknesses of 0.043 inches and 3.0mm, respectively. Manufactured from ductile iron with a plasma moly coating, it enhances wear resistance and reduces friction. The standard tension design ensures balanced ring pressure against cylinder walls, minimizing power loss while the plasma moly surface treatment extends the life of both the rings and cylinder walls.

Professionals and enthusiasts building eight-cylinder engines with 3.771-inch bore dimensions will find this MAHLE ring set particularly beneficial. Its precise engineering directly impacts compression ratio, blow-by control, and long-term engine reliability, making it an excellent choice for both competitive and street performance engines.