Description
Piston rings are critical to engine performance—they seal combustion pressure, control oil consumption, and maintain ring-to-wall contact across the entire stroke. A quality ring set like this Speed Pro unit ensures consistent compression, reduces blow-by, and extends engine life, whether you’re building a competition engine or refreshing a tired block. File-fit rings demand precision installation but reward you with superior sealing and lower friction compared to pre-gap options.
Technical Specifications:
- Bore diameter: 4.125″
- Ring thickness: 1/16 x 1/16 x 3/16″
- Material: Plasma moly-coated
- Design: Low-tension rings
- Fit type: File fit
- Quantity: 8-cylinder kit
- Manufacturer: Speed Pro
- MPN: R93465
- Fitment: Engine-specific—verify bore size
- Installation: Requires file fitting
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