MAHLE Bore Oil Ring Expander Standard Tension

The MAHLE Bore Oil Ring Expander in standard tension is a piston ring expander (also called an oil ring expander or oil control ring spacer-expander) for engine builds and rebuilds. It sits behind the oil control rail rings in the piston's oil ring groove. It pushes them outward against the cylinder wall so the oil ring can control oil consistently.

Key Features:

• Standard tension design for consistent oil control ring loading
• Made by MAHLE Motorsports, a name known for pistons and piston rings in performance and racing engines
• Helps the oil ring conform to the cylinder wall, which helps limit oil consumption and supports ring-to-bore sealing
• Machined construction made in the USA
• Sold in a range of bore sizes, so you can match the expander to your piston and ring package

MAHLE offers standard tension expanders separately for use with its ring sets, so you can replace or match the oil control component for your build. Select the child item that matches your bore size and ring specification.