MAHLE 42149CP.020 Engine Piston Ring Set Oversize - 0.020

The MAHLE 42149CP.020 is a premium oversize piston ring set engineered for engine rebuilds requiring a +0.020" (0.508mm) overbore. Designed to meet or exceed OEM specifications, this set delivers reliable sealing, optimized oil control, and long-term durability in demanding engine environments.

Key Features:

• +0.020" Oversize: Purpose-built for engines bored 0.020" over standard — measure your cylinders before ordering
• Pre-Lapped Rings: Factory pre-lapped for immediate seating, virtually eliminating traditional break-in time
• Barrel-Faced Compression Rings: CNC-controlled gap chamfer optimizes compression and minimizes blow-by
• Intermediate (Second) Ring: Reverse twist design for superior groove side sealing with taper-face machining for enhanced contact
• CP-20 Oil Ring Assembly: Exclusive 20-degree ear angle provides maximum side seal against the cylinder wall; chemically polished expander promotes enhanced oil drain-back
• Optimized Ring Materials & Coatings: Ring tension, materials, and surface finishes are application-matched for reduced friction and extended service life
• Complete Set: Includes all rings required for a full engine rebuild

MAHLE is one of the world's largest piston ring manufacturers, supplying OE-quality components to major engine producers globally. The 42149CP.020 ring set upholds that same standard of precision, making it a trusted choice for professional engine builders and serious DIY rebuilders alike.