Description
Piston rings are critical to engine sealing and compression—worn or improper rings lead to blow-by, oil consumption, and lost horsepower. The Hastings 4.040 ring set delivers precision file-fit construction with moly-coated surfaces for reduced friction and extended durability in high-performance applications. Whether you’re rebuilding a race engine or restoring a classic, this kit ensures proper ring gap control and reliable combustion chamber sealing.
- Bore diameter: 4.040″
- Ring thickness: 5/64 x 5/64 x 3/16″
- Material: Moly-coated
- Fit type: File fit
- Tension: Standard
- Configuration: 8-cylinder kit
- Installation: Requires ring file/gap tool
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