MAHLE 42257CP.020 Engine Piston Ring Set Oversize - 0.020

The MAHLE 42257CP.020 is a complete engine piston ring set precision-manufactured to +0.020" (0.508mm) oversize specifications, designed for use during engine rebuilds and overhauls where cylinders have been bored to the first standard oversize. MAHLE Original piston rings are produced to OEM-equivalent tolerances, ensuring proper cylinder sealing, oil control, and long-term engine performance.

Key Features:

• +0.020" Oversize — engineered for cylinders bored 0.020" over standard diameter
• Complete ring set includes compression rings and oil control ring assembly for one piston
• Manufactured to precise dimensional tolerances for optimal ring-to-wall contact and sealing
• High-quality base materials with wear-resistant coatings to reduce friction and extend service life
• Meets or exceeds OEM specifications for compression retention and oil control
• MAHLE Original quality — a trusted OEM supplier to major automotive manufacturers worldwide

MAHLE is a globally recognized OEM and aftermarket supplier with decades of experience in piston and ring technology. The 42257CP.020 ring set is ideal for professional engine rebuilders and performance shops seeking reliable, factory-quality components. Always verify bore diameter with a calibrated bore gauge before selecting oversize rings.