MAHLE 51686CP.040 Original Engine Piston Ring Set Oversize - 0.040

The MAHLE Original 51686CP.040 is a complete engine piston ring set engineered to OEM specifications and designed for use in oversize bore applications at the 0.040-inch (1.00mm) overbore size. MAHLE is a globally recognized OEM supplier, manufacturing piston rings to the same standards and tolerances found in original factory assemblies, making this set an ideal choice for engine rebuilds and overhauls.

Key Features:

• OEM-quality construction engineered to match original factory specifications
• 0.040" oversize bore dimension for use with properly bored and honed engine cylinders
• Complete ring set includes compression rings and oil control rings for each piston
• Precision-ground sealing surfaces for optimal cylinder wall contact and sealing
• Manufactured to tight tolerances for consistent ring gap and end-gap specifications
• Durable materials and coatings designed to resist wear and maintain compression
• MAHLE Original line sourced from a Tier 1 OEM supplier trusted by major automakers worldwide

Proper ring installation requires careful measurement of ring end gap and side clearance per engine specifications. This set is intended for use during professional engine rebuilds where cylinders have been bored 0.040 inches over the standard diameter. MAHLE's stringent quality control ensures reliable long-term performance and compression retention throughout the engine's service life.