MAHLE 41857CP.040 Engine Piston Ring Set Oversize - 0.040

The MAHLE 41857CP.040 is a complete engine piston ring set manufactured to original equipment specifications. The .040 suffix designates a +0.040-inch oversize, designed for use in engines that have been bored 0.040" over standard to restore proper cylinder wall clearance and compression during engine rebuilding.

MAHLE Original piston ring sets are engineered to meet or exceed OEM tolerances, ensuring reliable sealing, optimal oil control, and long service life. Each ring in the set is precision-manufactured from high-quality cast iron or ductile iron with surface treatments designed to promote fast break-in and reduce friction.

Key Features:

• +0.040" Oversize — engineered for cylinders bored 0.040" over standard diameter
• OEM-quality construction meeting or exceeding original manufacturer specifications
• Precision ring gap tolerances for optimal compression and sealing performance
• Advanced surface coatings promote rapid ring seating and reduced break-in wear
• High-quality cast iron or ductile iron construction for durability and heat resistance
• Engineered for proper oil control to minimize oil consumption
• Complete set includes compression rings and oil control rings for all cylinders

MAHLE is a globally recognized OEM supplier to major automotive manufacturers, and their MAHLE Original aftermarket line delivers the same engineering precision to engine rebuilders and performance shops. This piston ring set is an ideal choice for engine overhaul or rebuild projects requiring an oversize bore specification.