Description
Piston rings are critical to engine efficiency—they seal combustion pressure, regulate oil consumption, and prevent blowby that robs your engine of power. This Speed Pro kit delivers plasma moly-faced rings engineered for reliable performance across high-RPM applications, ensuring consistent compression and longevity in demanding conditions. File-fit construction gives you precision control during installation for optimal ring seating and immediate performance gains.
- Bore Size: 4.040″
- Ring Thickness: 1/16 x 1/16 x 3/16″
- Material: Plasma moly-faced
- Fit Type: File fit
- Tension: Standard
- Application: 8-cylinder engines
- Quantity: Full kit
- Manufacturer: Speed Pro
- MPN: R977145






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