MAHLE 3150033-065 Performance Piston Ring Set +0.065" Overbore

The MAHLE 3150033-065 is a precision-ground performance piston ring set engineered for high-output engine builds. Sized at a +0.065" overbore, this ring set is designed for engines that have been bored or honed beyond the standard bore diameter, delivering a precise fit critical for proper compression sealing and oil control.

Key Features:

• Precision-ground construction for consistent fitment and minimal blowby
• Plasma-moly or steel top ring coating options engineered for superior scuff resistance and extended wear life
• Tapered Hook Groove (THG) second ring design acts as a check valve to relieve combustion pressure buildup beneath the top ring, improving ring stability and sealing
• CP-20 oil control ring assembly features a 20-degree ear angle for maximum side sealing against the cylinder wall, plus a chemically polished expander for enhanced oil drainback
• Barrel-faced top ring contact area promotes efficient compression and reduces break-in time
• Ultra-flat ring flanks maximize ring-to-piston groove sealing
• +0.065" overbore sizing for use in bored or honed engine blocks
• Sold as a complete set

MAHLE is the world's largest piston ring manufacturer, with over a century of OE and aftermarket engineering experience. More than 60% of production engines built in North America use MAHLE pistons or rings, making this ring set a trusted choice for engine rebuilders and performance enthusiasts alike.