Perf. Piston Ring Set V8 4.165 Bore 1.2x1.5x3.0

The Perf. Piston Ring Set V8 4.165 Bore 1.2x1.5x3.0 is engineered for high-performance American V8 engine applications requiring precision ring geometry and reliable sealing. This eight-cylinder piston ring kit addresses the exacting demands of engines built to OEM specifications or performance-oriented rebuilds where cylinder bore diameter and ring thickness tolerances directly impact compression integrity, blow-by control, and fuel economy. Whether you're restoring a classic big-block or maintaining fleet equipment that depends on consistent engine performance, this ring set delivers the metallurgical and dimensional accuracy necessary for dependable operation.

Manufactured from hardened steel with nitride surface treatment, the Perf. Piston Ring Set utilizes standard tension characteristics optimized for 4.165-inch bore diameter engines. The 1.2 × 1.5 × 3.0 mm ring thickness configuration—combined with the nitride finish—provides superior wear resistance, reduced friction, and extended service life across varied operating conditions. Nitride treatment enhances hardness and corrosion resistance without adding bulk, a critical advantage in high-heat, high-load combustion environments. The standard tension design balances ring-to-wall contact pressure, minimizing excessive wear while maintaining effective sealing geometry across the piston's full travel.

Engine rebuilders, mechanics, and motorsport technicians rely on this kit for 8-cylinder applications where bore sizing is critical—any deviation from 4.165 inches renders the set unsafe and ineffective. Proper installation requires precision honing to match specified bore diameter, careful ring gap setting per manufacturer guidelines, and correct packing order during assembly. This complete ring set is suitable for both standard rebuilds and performance applications where ring durability and sealing consistency determine engine longevity and efficiency. Verify your engine's exact bore diameter before ordering; rings are size-specific and non-interchangeable across bore variations.