Description
Piston rings are critical to engine efficiency—they seal combustion pressure, control oil consumption, and maintain proper compression in your cylinder bores. A quality ring set directly impacts horsepower delivery, fuel economy, and engine longevity. The Speed Pro SEAR5879-65 delivers reliable, file-fit performance for 4.185″ bore engines, making it an ideal choice for both street and competition builds.
This kit combines proven plasma moly coating technology with standard tension specs, ensuring consistent ring-to-wall contact across the entire RPM band. Whether you’re refreshing a tired engine or building a fresh long-block, these rings provide the precision fit and durability you need to avoid blow-by and maintain peak performance.
- Bore diameter: 4.185″
- Ring thickness: 5/64 x 5/64 x 3/16″
- Material: Plasma moly coated
- Tension: Standard
- Fitment: File fit required
- Application: 8-cylinder engines
- Quantity: Full kit (set)
- Manufacturer: Speed Pro
- MPN: R587965
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