MAHLE 9298684 Oil Ring Support Rail 4.040-4.080 Bore 3mm Width

The MAHLE 9298684 is a precision-engineered oil ring support rail designed for performance engine applications with cylinder bore sizes ranging from 4.040 to 4.080 inches. This 3mm support rail is an essential component in high-performance piston assemblies, ensuring proper oil ring function and optimized engine performance.

Key Features:

• Fits bore sizes from 4.040 to 4.080 inches
• 3mm (approximately 0.118 inch) rail thickness
• Prevents piston rotation for improved cylinder sealing
• Reduces friction for enhanced performance
• Ensures proper gas pressure distribution at high RPM
• Precision-manufactured to MAHLE Motorsport specifications

Oil ring support rails are critical components in performance engine builds, particularly when using low-tension or reduced radial wall oil rings. The support rail sits in the oil ring groove and provides additional support and stability to the oil ring assembly, preventing rotation and maintaining consistent ring-to-cylinder wall contact. This results in improved sealing, minimized oil consumption, and optimized power output.

MAHLE Motorsport is a globally recognized leader in piston and ring technology, with over 80 years of experience producing components for applications ranging from OEM to Formula 1 racing. Each support rail is manufactured to exacting tolerances to ensure proper fit and function in high-performance engine assemblies.