MAHLE 42192CP.040 Premium Engine Piston Ring Set Oversize - 0.040

The MAHLE 42192CP.040 is a premium engine piston ring set engineered to OEM-grade standards, designed for engines requiring a +0.040" oversize bore fitment. As the world's largest piston ring manufacturer, MAHLE produces rings that meet or exceed original equipment specifications, making this set an ideal choice for engine rebuilds, overhauls, and performance restorations.

Key Features:

• Pre-lapped finish allows rings to seat immediately, virtually eliminating extended break-in periods
• Optimized ring tension and premium coatings engineered to reduce friction and extend service life
• Barrel-faced compression rings provide more efficient compression sealing and reduce cylinder wall wear
• CNC-controlled gap chamfer on compression rings optimizes compression retention and minimizes blow-by
• Reverse-twist intermediate rings deliver superior groove side sealing for improved oil control
• Taper-face machining on intermediate rings enhances cylinder wall contact and sealing consistency
• CP-20 oil ring assemblies feature an exclusive 20-degree ear angle for maximum side seal against the cylinder wall
• Chemical polish on the oil ring expander promotes enhanced oil drain-back performance
• +0.040" oversize bore designation for use in properly re-bored or honed engine blocks
• Manufactured to OEM tolerances for direct-fit installation

MAHLE Original piston ring sets are the choice of professional engine builders worldwide. Ring materials, coatings, and tension values are application-optimized for long-lasting durability and consistent performance across the full range of operating conditions.