Perf. Piston Ring Set V8 4040 Bore 1.2x1.2x3.0

The Perf. Piston Ring Set V8 4040 Bore 1.2x1.2x3.0 from NPR PISTON RINGS is designed for high-performance V8 engines that require precision ring fitment and optimal compression sealing. This set is ideal for serious builders and engine rebuilders looking to enhance engine performance and longevity.

Featuring a 4.040-inch bore diameter with a 1.2-inch top ring, 1.2-inch second ring, and 3.0-inch oil ring configuration, this modern design balances gas sealing efficiency with minimal friction loss. The NPR manufacturing process ensures consistent ring thickness, proper side clearance, and exact gap tolerances that prevent excessive blow-by or ring sticking during extreme combustion events.

This piston ring set is perfect for engine rebuilders, performance shops, and enthusiasts restoring or modifying small-block and big-block V8 powerplants with 4.040-inch bore specifications. Proper installation requires careful honing of cylinder walls to match NPR specifications and precise gapping for your intended application, which is critical for optimal performance.