Piston Ring 4.045 (1pk) 1.0mm 1.0mm 2.0mm

The Piston Ring 4.045 (1pk) 1.0mm 1.0mm 2.0mm from MAHLE PISTONS is a crucial compression seal component designed for high-performance engine rebuilds and modifications. This product is ideal for mechanics and automotive enthusiasts who are restoring classic engines or upgrading modern platforms.

This piston ring set features a 4.045-inch bore diameter with a carefully engineered configuration: one 1.0mm compression ring, one 1.0mm secondary compression ring, and a 2.0mm oil control ring. The design maximizes sealing pressure against the cylinder wall while minimizing blow-by and reducing friction losses during the power stroke. MAHLE's precision manufacturing ensures consistent gap clearances and proper fit, which are critical for maintaining compression integrity.

This ring set is suitable for engines in the 4.045-inch bore class, commonly found in mid-displacement V-8 and inline applications across American muscle cars, trucks, and performance builds. Proper installation requires careful ring gap measurement and correct orientation, as compression rings typically feature a barrel or taper profile that must face the correct direction. This single-pack quantity makes it ideal for individual piston replacements.