Piston Ring Set 4.130 1.5 1.5 3.0mm

The Piston Ring Set 4.130 1.5 1.5 3.0mm by MAHLE PISTONS is purpose-built for serious engine builders and performance enthusiasts who demand precision in high-revving applications. This file-fit ring set serves as the critical seal between piston and cylinder wall, controlling blowby, managing oil consumption, and maintaining compression integrity under extreme load. Whether you're rebuilding a race engine, restoring a classic muscle car, or upgrading a street performance build, these rings deliver the OEM-level fitment and material science that separates reliable builds from failed ones.

Engineered from ductile iron with plasma moly plating, the Piston Ring Set 4.130 features a three-ring configuration—1.5mm compression ring, 1.5mm secondary compression ring, and 3.0mm oil ring—optimized for 8-cylinder engines with a 4.130-inch bore diameter. The plasma moly coating provides superior wear resistance and reduces friction during initial break-in, critical for preventing ring stiction and premature bore damage. Standard tension design ensures balanced pressure against cylinder walls without excessive drag, a key factor in maintaining power output and fuel efficiency during sustained operation. File fit means each ring requires precise honing and gap setting to your specific bore, allowing customization for your intended application—drag racing, street duty, or high-altitude operation each benefit from tailored ring gaps.

Professional engine builders, machine shops, and advanced DIY restorers rely on MAHLE's precision manufacturing for 8-cylinder platforms requiring exact 4.130-inch bore specifications. Installation demands proper ring gap clearance (typically 0.004–0.006 inches per inch of bore), honed cylinders to specification, and careful ring seating during engine break-in to activate the moly coating. This ring set pairs seamlessly with quality pistons, premium cylinders, and modern ring compressors, making it essential for any serious engine rebuild where long-term durability and performance cannot be compromised.