Description
Proper ring seal is foundational to engine performance and longevity—without it, you’re losing compression, burning oil, and hemorrhaging power. This 4.070″ bore piston ring set delivers the precise fitment and material quality required for high-performance applications, ensuring consistent blowby control and reliable ring-to-wall contact across the entire RPM range. Whether you’re building a race engine or rebuilding a performance platform, these file-fit rings are engineered for the exacting tolerances that separate mediocre from championship-grade results.
- 4.070″ bore diameter
- Tolerance: +.005″
- Top ring: 1.5mm
- Second ring: 1.5mm
- Oil control ring: 3.0mm
- File fit application
- MPN: 4075MS-15
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