MAHLE 42160.030 Engine Piston Ring Set - GM 6.6L Duramax .030" Oversize

The MAHLE 42160.030 is a complete engine piston ring set engineered as a direct OE replacement for the GM 6.6L Duramax diesel engine. The .030" oversize designation makes this set the correct choice for engines that have been bored 0.030 inches over standard to restore factory compression and sealing performance.

Key Features:

• OE-Quality Construction: Manufactured to original equipment specifications for a true factory-grade replacement
• Pre-Lapped Rings: Rings arrive pre-lapped for immediate seating, significantly reducing engine break-in time
• Optimized Ring Tension: Ring materials, coatings, and tension are precisely calibrated for reduced friction and extended service life
• Compression Ring Design: Barrel-faced contact area improves compression efficiency; CNC-controlled gap chamfer minimizes blow-by
• Intermediate Ring: Reverse twist design enhances groove side sealing; taper race machining improves cylinder wall contact
• Oil Ring Assembly: Features a 20-degree ear angle for superior cylinder wall side sealing and a chemically polished expander for improved oil drain-back
• .030" Oversize: Sized for use in engines bored 0.030 inches over standard bore diameter

MAHLE is a globally recognized leader in engine components, producing OE and aftermarket parts for virtually every major vehicle platform. The 42160.030 piston ring set delivers the reliability and precision that professional engine builders and diesel enthusiasts demand for a lasting, high-performance rebuild.