MAHLE 3150033-035 Precision-Ground Performance Piston Ring Set

The MAHLE 3150033-035 is a precision-ground, plasma-moly ductile iron piston ring set engineered for high-performance and racing engine applications. Designed for a 4.030-inch bore with a +0.035-inch oversize, this file-fit ring set is built to deliver maximum combustion sealing and reduced frictional losses in 8-cylinder engines.

Key Features:

• Plasma-moly top ring: Barrel-faced ductile iron top compression ring with plasma-moly inlay for instant break-in, superior scuff resistance, and long-term durability under high heat and pressure
• Napier THG second ring: Tapered hook groove (Napier) design second compression ring provides superior oil control by scraping cylinder walls on each downstroke, while also acting as a check valve to relieve excess combustion pressure buildup beneath the top ring
• CP-20 oil control ring: 3-piece oil ring assembly featuring a stainless steel expander between two chrome-faced steel rails, delivering outstanding conformability to the cylinder wall and maximum oil control
• File-fit design: Allows end gaps to be precision-set to your specific application for optimized performance
• Ring pack dimensions: 1/16 in. top compression ring, 1/16 in. second compression ring, 3/16 in. oil control ring
• Standard tension: Suitable for performance street and competition builds
• 8-cylinder set: Sold as a complete set for one 8-cylinder engine
• Bore size: 4.030 in. standard bore with +0.035 in. oversize

MAHLE is the world's largest piston ring manufacturer, with over a century of OE and aftermarket experience. The 3150033-035 ring set is manufactured under strict quality controls using high-strength materials and precision ring face contours to ensure consistent sealing, reduced blow-by, and long service life in demanding performance applications.