MAHLE 3030579 Performance Oil Ring Assembly Bore - CP-20 3.7010 4.0mm Chrome

The MAHLE 3030579 is a high-performance CP-20 oil ring assembly designed for precision engine building and rebuilds. Engineered for a 3.7010-inch bore diameter with a 4.0mm assembled width, this oil ring features MAHLE's proven three-piece design with standard tension and chrome-plated rails for superior durability and oil control.

Key Features:

• CP-20 design with exclusive 20-degree ear angle for optimal cylinder wall sealing
• Three-piece construction: two chrome-plated steel rails and a precision expander
• Standard tension configuration for reliable oil control across a wide range of applications
• Pre-lapped rails for quick seating and virtually instant break-in
• ChemPolish process for improved oil drain-back and reduced friction
• Designed for specific bore diameter to ensure proper fitment and performance
• Easy installation without wire latches or nylon blocks

MAHLE's CP-20 oil ring technology represents the pinnacle of piston ring engineering, providing exceptional oil control while minimizing tension on cylinder walls. The chrome-plated rails resist wear and scuffing under extreme conditions, making this ring assembly ideal for both performance and racing applications. Each component is precision-manufactured to meet or exceed OE specifications.