MAHLE 3150032-005 Performance Piston Ring Set +0.005 in. Oversize File-Fit

The MAHLE 3150032-005 is a precision-ground performance piston ring set designed for high-output engines demanding superior sealing, durability, and reduced friction. This set is sized at +0.005 in. oversize and is sold as a complete file-fit ring set for a single cylinder, making it ideal for engine builders who require tight tolerances and maximum control over end gap specification.

MAHLE engineers these performance rings using advanced simulation and computer development tools to minimize friction and maximize power output. The result is a ring package proven on the dyno and on the track.

Key Features:

• Barrel-faced top ring — provides instant break-in and maintains consistent contact with the cylinder wall as the piston rocks at TDC and BDC
• HV385 Thermal Spray face coating — patented supersonic thermal-spray process using hard, self-lubricating metal and ceramic alloys for superior bonding, scuff resistance, and durability comparable to gas nitride, PVD, and DLC treatments
• Napier THG (Tapered Hook Groove) second ring — acts as a check valve to relieve combustion pressure buildup under the top ring, and scrapes cylinder walls of oil on each downstroke for superior oil control
• CP-20 oil control ring — named for its 20-degree ear angle, this exclusive design delivers the best possible cylinder wall seal and oil management
• File-fit design — allows the engine builder to set precise end gap for the specific application
• +0.005 in. oversize — engineered for bores that have been slightly enlarged during reconditioning

MAHLE is the world's largest piston ring manufacturer, with over a century of experience supplying original equipment and aftermarket rings to leading engine manufacturers worldwide. The 3150032-005 ring set delivers the same engineering excellence found in OEM applications, purpose-built for performance engine builds.