MAHLE 42264.040 Engine Piston Ring Set Oversize - 0.040

The MAHLE 42264.040 is a complete engine piston ring set ground to a 0.040" (1.00mm) oversize specification, designed for use during engine rebuilds where cylinders have been bored 0.040" over the standard diameter. MAHLE is the world's largest manufacturer of piston rings, supplying OEM-quality components to major engine producers worldwide.

Key Features:

• Pre-lapped rings seat quickly upon installation, significantly reducing engine break-in time
• Optimized ring tension, materials, and coatings for reduced friction and extended service life
• Barrel-faced compression rings provide a more efficient compression seal and reduce blow-by
• CNC-controlled gap chamfer on compression rings optimizes compression retention
• Reverse twist intermediate rings improve groove side sealing with taper-race machined contact surfaces
• CP-20 oil ring assembly features a 20-degree ear angle for superior side sealing against the cylinder wall
• Chemical-polished oil ring expander promotes enhanced oil drain-back performance
• 0.040" oversize ground to exacting tolerances for proper fit in freshly bored cylinders

Built to OEM specifications, the MAHLE 42264.040 piston ring set delivers reliable compression sealing, oil control, and heat transfer for a properly rebuilt engine. This set is the choice of professional engine builders seeking installer-friendly, high-quality ring sets that meet or exceed original equipment standards.