MAHLE 42149CP.040 Premium Plasma-Moly Piston Ring Set Bore - 3.630 0.040 V8

The MAHLE 42149CP.040 is a premium plasma-moly piston ring set designed for V8 engines with a 3.630-inch bore diameter at +0.040" oversize. Engineered to OEM tolerances by one of the world's foremost piston and ring manufacturers, this set delivers reliable sealing performance and reduced friction for both engine rebuilds and performance applications.

Key Features:

• Plasma-moly top ring coating for superior wear resistance and cylinder wall sealing
• Pre-lapped finish seats rings immediately, virtually eliminating traditional break-in time
• Barrel-faced compression ring contact area for more efficient compression and reduced blow-by
• CNC-controlled gap chamfer on compression rings optimizes compression sealing
• Intermediate rings with reverse twist design for enhanced groove side sealing and taper race machining for improved contact
• CP-20 oil ring assemblies feature an exclusive 20-degree ear angle for optimal side sealing against the cylinder wall
• Chemically polished oil ring expander promotes enhanced oil drain-back performance
• Ring thickness: 1.2mm top / 1.2mm second / 2.5mm oil
• Ring materials and tension optimized per application for reduced friction and extended service life

MAHLE Original piston ring sets are a trusted choice among professional engine builders worldwide, combining installer-friendly design with the precision manufacturing quality expected from a global OEM supplier.