MAHLE 3150004-005 Clevite Plasma-Moly Piston Ring Set 4.125 in. Bore File Fit 8-Cylinder

The MAHLE Clevite 3150004-005 is a plasma-moly piston ring set engineered for 8-cylinder performance and race engines with a 4.125-inch bore (standard +.005" oversize). Featuring a file-fit design, this set allows builders to precisely gap each ring to their specific application for optimum sealing and power output.

These rings utilize a ductile iron construction with a plasma-moly face coating on the top compression ring, delivering outstanding scuff resistance, rapid break-in characteristics, and long service life under high heat and high-RPM operating conditions. The ring widths follow the traditional 1/16 in. / 1/16 in. / 3/16 in. configuration (top compression / second compression / oil control).

Key Features:

• Plasma-moly top ring: Ductile iron construction with moly face inlay for reduced friction and extended cylinder wall life
• THG second compression ring: Tapered hook groove design provides superior oil control and improved combustion gas management
• File-fit design: Allows precise end-gap customization for maximum performance builds
• Ring widths: 1/16 in. top, 1/16 in. second, 3/16 in. oil control
• Bore size: 4.125 in. (+.005 in. oversize)
• Application: 8-cylinder engines
• Complete set includes rings for all eight cylinders

MAHLE Clevite plasma-moly ring sets are a trusted choice for performance engine builders seeking precise fitment, proven durability, and measurable power gains. The file-fit design is ideal for custom engine builds where precise ring gap control is critical to achieving target compression and minimizing blow-by.