MAHLE 4060-300S 4.060" Oil Ring Expander 3.0mm Standard Tension

The MAHLE 4060-300S is a premium oil ring expander designed for high-performance engine builds requiring precise 4.060" bore diameter compatibility. This standard tension expander features a 3.0mm width specification, engineered to provide optimal radial pressure for proper oil control ring function.

Key Features:

• 4.060" bore diameter specification for exact fitment
• 3.0mm width design for proper ring support
• Standard tension rating for OEM and performance applications
• Precision-manufactured spring steel construction
• Provides consistent radial pressure across the entire ring circumference
• Ensures proper oil control ring seating and sealing

MAHLE oil ring expanders are critical components in piston ring assemblies, sitting behind the oil control rings to maintain constant outward pressure against the cylinder wall. This ensures effective oil control, reducing consumption and blowby while maximizing ring life. The standard tension design makes this expander suitable for most street and performance applications where OEM-equivalent oil control is required.