Perf. Piston Ring Set V8 4.100 Bore 1.2x1.5x3.0

The Perf. Piston Ring Set V8 4.100 Bore 1.2x1.5x3.0 is designed for serious engine builders and performance enthusiasts who require precision in ring control and compression consistency for high-output V8 applications. This NPR piston ring set is tailored for a 4.100-inch bore diameter, making it suitable for street performance, bracket racing, and naturally aspirated builds where effective ring sealing is crucial for power delivery and engine longevity.

The three-piece ring design features a top ring thickness of 1.2mm, a second ring thickness of 1.5mm, and an oil ring thickness of 3.0mm. This configuration provides staggered radial wall thickness for optimized gas sealing, reduced friction, and efficient oil control. NPR's engineering emphasizes dimensional consistency and proper tension to minimize blow-by and ring flutter at high RPM, ensuring reliability across various performance conditions.

Ideal for engine builders and DIY enthusiasts, this piston ring set is essential for assembling stroker motors, refreshing rebuilt blocks, or optimizing existing platforms. The proven 1.2x1.5x3.0 profile balances minimum tension loss with reliable cylinder sealing under various conditions, including boost and nitrous applications. With tighter tolerances and premium materials, these rings maintain their sealing characteristics through extended heat cycles typical of road racing and sustained power applications.