Description
Piston rings are critical to engine sealing and compression integrity—without proper rings, you’ll lose power, burn oil, and compromise engine longevity. The Speed Pro R9903 Piston Ring Set delivers reliable sealing for 4.000″ bore engines with plasma moly coating for enhanced durability under high-heat conditions. Whether you’re rebuilding a street engine or refreshing a performance build, this kit ensures consistent blow-by control and optimal compression retention across all eight cylinders.
- Speed Pro brand
- 4.000″ bore size
- 5/64 x 5/64 x 3/16″ dimensions
- Plasma moly coating
- Standard tension
- 8-cylinder kit
- Bolt-on installation
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