MAHLE 41787CP-030 Plasma-Moly Piston Ring Set Bore - 3.581 8-Cylinder

The MAHLE 41787CP-030 Precision-Ground Performance Piston Ring Set delivers OE-quality reliability and performance for 8-cylinder engines with a 3.581-inch bore diameter (0.030" oversize). Engineered with premium materials and manufactured under strict quality controls, this complete ring set is designed for professional engine builders and enthusiasts who demand superior sealing and durability.

Key Features:

• Plasma-moly top compression ring provides extended wear life under severe operating conditions
• Taper face reverse twist design second ring for improved oil control and groove sealing
• Three-piece oil ring assembly with stainless steel expander and chrome-faced steel rails for maximum conformability
• Ring dimensions: 1.5mm, 1.5mm, 3.0mm thickness configuration
• Pre-lapped rings seat immediately, virtually eliminating break-in time
• Barrel-faced contact area on compression rings for efficient sealing and reduced blow-by
• CNC-controlled gap chamfer optimizes compression and minimizes power loss
• Shallow oil groove design for enhanced oil control
• Foolproof design prevents incorrect installation, saving time and preventing errors

MAHLE piston rings utilize SAE 9254 high-alloy steel base material for superior tensile strength, extended fatigue resistance, and increased hardness. The precision-ground finish and ultra-flat ring flanks maximize ring-to-piston sealing while minimizing friction for measurable performance gains. Ideal for engine rebuilds, overhauls, and performance applications requiring reliable compression sealing and oil control.