Perf. Piston Ring Set V8 4.150 Bore 1.2x1.5x3.0

The Perf. Piston Ring Set V8 4.150 Bore 1.2x1.5x3.0 is engineered for high-performance American V8 engines requiring precision ring geometry and reliable compression sealing. Whether rebuilding a naturally aspirated stroker engine or restoring original displacement performance, this 8-cylinder ring kit delivers the thermal management and blow-by control critical to engine longevity and fuel efficiency. Built to OEM specifications and tested across demanding applications, these rings suit both street and competition builds where consistent compression ratios directly impact throttle response and reliability.

Manufactured in hardened nitride steel, the Perf. Piston Ring Set features a 1.2 mm top ring, 1.5 mm second ring, and 3.0 mm oil control ring configuration—a proven design that minimizes friction loss while maintaining dynamic sealing under peak combustion pressure. Standard tension specifications ensure proper ring-to-bore contact without excessive side loading, reducing wear on cylinder walls and extending engine service intervals. The nitride surface treatment provides superior corrosion resistance and reduces scuffing during cold startup, critical for engines subject to seasonal storage or variable operating conditions.

This ring set is compatible with all V8 engines machined to a 4.150-inch bore diameter, including common big-block and small-block variants from domestic manufacturers. Installation requires proper ring gap filing to match actual bore dimensions and piston-to-wall clearance; precision honing to final bore size is essential for optimal ring sealing. The complete 8-cylinder kit—weighing just 0.75 lbs—ships ready for immediate installation into machined blocks, making it an economical choice for engine rebuilders, restoration shops, and performance enthusiasts tackling comprehensive engine refreshes.