MAHLE 42171.040 Engine Piston Ring Set Oversize - 0.040

The MAHLE 42171.040 is a complete engine piston ring set manufactured to original equipment standards. The .040 suffix denotes a 0.040-inch (1.00mm) oversize bore dimension, making this set designed for use in engines that have been bored or honed beyond the standard cylinder diameter during an overhaul or rebuild.

MAHLE is a globally recognized OEM-level supplier of engine components, manufacturing piston rings to precise dimensional and metallurgical tolerances to ensure optimal sealing, oil control, and long service life.

Key Features:

• 0.040" (1.00mm) oversize bore specification for rebuilt or re-bored engines
• Manufactured to OEM tolerances for proper ring end-gap and radial wall thickness
• Includes compression rings and oil control ring assembly
• Engineered for proper seating and break-in performance
• Helps restore compression, minimize blow-by, and control oil consumption
• Produced by MAHLE, a trusted global OEM engine components supplier

This piston ring set is an essential component for any quality engine rebuild, ensuring the cylinder bore is properly sealed for restored compression and performance. Always verify bore diameter with a precision bore gauge before selecting oversize ring sets.