MAHLE 42225CP Chrome Piston Ring Set L4 1.2mm/1.2mm/2.0mm

The MAHLE 42225CP is a premium chrome OE-replacement piston ring set engineered for four-cylinder (L4) engines with a 3.307-inch bore and ring thickness specifications of 1.2mm / 1.2mm / 2.0mm. This set is designed to meet or exceed original equipment standards for sealing performance, oil control, and long-term durability.

Key Features:

• OE Form, Fit & Function: Engineered to match original equipment specifications for precise fitment and reliable performance
• SAE 9254 High Alloy Steel Base Material: Delivers higher tensile and yield strength, extended fatigue resistance, and increased material hardness
• Pre-Lapped Design: Rings seat immediately upon installation, virtually eliminating traditional break-in time
• Optimized Ring Tension & Coatings: Materials and coatings are application-specific to reduce friction and extend service life
• Barrel-Faced Compression Rings: Provides more efficient compression with a CNC-controlled gap chamfer to minimize blow-by
• Reverse Twist Intermediate Rings: Features taper race machining and reverse twist geometry for superior groove side sealing
• CP-20 Oil Ring Assembly: Exclusive 20-degree ear angle delivers the best possible side seal within the piston oil ring groove, while a special chemical polish on the expander promotes enhanced oil drain-back

MAHLE is one of the largest OE piston ring manufacturers in the world, and the 42225CP reflects their commitment to reducing friction and ring mass while minimizing oil consumption and extending engine life. This ring set is an ideal choice for professional engine builders and experienced DIY mechanics performing engine rebuilds or overhauls.