MAHLE 40452CP.020 Plasma-Moly Piston Ring Set +0.020" Oversize AMC/Chevy

The MAHLE 40452CP.020 is a premium plasma-moly piston ring set designed for engine rebuilds on select AMC 150 (2.46L) and Chevrolet 153 cubic inch four-cylinder engines. This set is sized at +0.020" oversize, making it ideal for bored engines requiring a precise fit during a rebuild. The "CP" designation identifies this as part of MAHLE's CP-20 series — engineered for OE-level performance and installer-friendly design.

Key Features:

• Plasma-Moly Top Ring: Moly-faced compression ring delivers reduced friction, excellent wear resistance, and fast seating for long service life
• Pre-Lapped Rings: Factory pre-lapping ensures rings seat immediately upon startup, virtually eliminating traditional break-in time
• Barrel-Faced Compression Rings: CNC-controlled barrel face profile and gap chamfer optimize compression and minimize blow-by
• Reverse-Twist Intermediate Ring: Taper-race machined intermediate (second) ring uses a reverse twist design for superior groove side sealing and enhanced contact
• CP-20 Oil Ring Assembly: Features an exclusive 20-degree ear angle for maximum side seal against the cylinder wall, plus a chemically polished expander for enhanced oil drain-back
• Optimized Materials & Tension: Ring materials, coatings, and tension are application-matched to reduce friction and extend engine life
• +0.020" Oversize: Designed for engines bored 0.020" over standard bore diameter

Note: This product is not CARB-approved and is not legal for sale or use in California.

MAHLE is a globally recognized OE supplier and aftermarket leader in engine components. The 40452CP.020 piston ring set delivers the same precision engineering found in OEM applications, making it the trusted choice of professional engine builders rebuilding AMC and early Chevrolet four-cylinder engines.