Piston Ring Set 4.035 1.0 1.0 2.0mm

The MAHLE PISTONS Piston Ring Set 4.035 1.0 1.0 2.0mm is a precision-engineered component designed for serious engine builders and performance enthusiasts tackling high-rev applications and custom builds. This file-fit ring set is engineered to deliver superior compression sealing, oil control, and blow-by management—critical factors when rebuilding or refreshing an 8-cylinder engine. Whether you're assembling a stroker, preparing for forced induction, or restoring a classic engine to original specifications, this ring set provides the reliable sealing geometry that separates a quality rebuild from a compromised one.

Manufactured from HV385 thermal-treated steel, the 4.035mm bore rings feature a three-piece design with 1.0mm top compression ring, 1.0mm secondary compression ring, and 2.0mm oil control ring dimensions. This ring thickness progression is optimized for standard tension loading, delivering consistent wall pressure across the bore while maintaining minimal drag—essential for maximizing horsepower and fuel efficiency in performance engines. The file-fit design requires honing to final bore specifications, allowing builders to achieve precise piston-to-cylinder clearances and ring gap tolerances that ensure proper operation under peak combustion pressures and extended duty cycles.

This ring set is ideal for machine shops, engine builders, and dedicated enthusiasts who prioritize repeatability and durability in 8-cylinder applications ranging from street engines to competition builds. Installation requires proper bore honing and ring gap fitting—steps that separate professional rebuilds from amateur work. MAHLE's thermal treatment process resists scuffing and promotes rapid ring seating, reducing break-in wear and ensuring long-term durability. Verify bore diameter, piston design, and clearance specifications before ordering to guarantee compatibility with your specific engine platform.