MAHLE 41617 Premium Plasma-Moly Piston Ring Set 4.250 in. Bore V8

The MAHLE 41617 is a premium plasma-moly piston ring set engineered for V8 engines with a 4.250-inch bore. Built to OE form, fit, and function standards, this ring set is a direct replacement designed for engine builders who demand quality and durability. Ring thicknesses are 5/64 in. (top), 5/64 in. (second), and 3/16 in. (oil), with a shallow oil ring groove design.

Key Features:

• Plasma-moly face coating on compression rings for superior wear resistance and reduced friction
• SAE 9254 high-alloy steel base material provides higher tensile and yield strength, extended fatigue resistance, and increased hardness
• Barrel-faced compression ring contact area for more efficient compression and reduced blow-by
• CNC-controlled gap chamfer on compression rings to optimize sealing and minimize blow-by
• Reverse-twist intermediate rings for enhanced groove side sealing and taper race machining for improved contact
• CP-20 oil ring assemblies with exclusive 20-degree ear angle for best-in-class side seal against the cylinder wall
• Stainless steel oil ring assembly with shallow groove design and chemically polished expander for enhanced oil drain-back
• Pre-lapped finish allows rings to seat immediately, virtually eliminating break-in time
• Standard oversize — sold as a complete set

MAHLE is one of the world's largest OE piston ring manufacturers, supplying more than 100,000 OE and aftermarket parts globally. The 41617 ring set reflects MAHLE's commitment to reducing friction and ring mass while minimizing oil consumption and maximizing service life — making it the preferred choice for professional engine rebuilders.