MAHLE 42109CP.040 Engine Piston Ring Set Chrysler 2.4L Turbo .040 Over Bore

The MAHLE 42109CP.040 is a premium engine piston ring set engineered for the Chrysler 2.4L Turbo GEMA/World Engine. Featuring a .040" oversize bore, this complete ring set is built to OEM standards and delivers the same precision fit and performance as the original factory rings—making it an ideal choice for engine rebuilds or high-mileage restoration projects.

Key Features:

• OEM-Quality Construction – Manufactured to original equipment specifications for a precise, reliable fit
• Pre-Lapped Rings – Rings are pre-lapped at the factory for immediate seating with virtually no break-in period required
• Reduced Friction Design – Ring materials, coatings, and tension are optimized to minimize friction and reduce engine oil consumption
• Barrel-Faced Compression Rings – Provides more efficient combustion sealing with a CNC-controlled gap chamfer to reduce blow-by
• Reverse-Twist Intermediate Rings – Engineered with taper race machining for enhanced groove-side sealing and improved cylinder wall contact
• CP-20 Oil Ring Assembly – Features a 20-degree ear angle for superior side sealing against the cylinder wall, plus a chemically polished expander for enhanced oil drain-back
• .040" Oversize – Designed for cylinders bored .040" over standard to restore proper compression and sealing
• Sold as a Complete Set – Includes all rings required for the engine

MAHLE is a globally recognized OEM supplier and technology leader in engine components. The MAHLE Original piston ring line represents the latest in piston ring engineering, helping engine builders restore factory compression, minimize oil consumption, and extend engine service life with confidence.