MAHLE 51473CP.040 Original Engine Piston Ring Set Oversize - 0.040

The MAHLE Original 51473CP.040 is a professional-grade engine piston ring set manufactured to OEM specifications. Sized at +0.040 inch (1.016mm) oversize, this set is designed for use in engines where the cylinder bores have been machined or bored out during a rebuild, restoring proper compression and oil control to OEM performance levels.

MAHLE Original piston rings are engineered to meet or exceed the standards of the original equipment manufacturer, making them a trusted choice for professional engine builders and rebuild shops. Each ring in the set is precision-manufactured for consistent gap tolerances, surface finish, and tension — critical factors in achieving a proper seal and long engine life after a rebuild.

Key Features:

• +0.040" Oversize — engineered for bored cylinders, not standard bore applications
• OEM-quality construction meeting or exceeding original manufacturer specifications
• Precision-controlled ring gap and tension for reliable compression sealing
• Includes compression rings and oil control ring components for a complete set
• Manufactured by MAHLE, a globally recognized OEM supplier to major automotive manufacturers
• Resists wear, heat, and thermal cycling typical of internal combustion engines

MAHLE is one of the world's largest suppliers of pistons, piston rings, and engine components to OEM manufacturers. The MAHLE Original line brings that same engineering quality to the aftermarket, ensuring a dependable foundation for any engine rebuild.