81.5mm Forged Piston & H-Beam Connecting Rod Kit

The Wiseco Pistons & Eagle Rods kit is engineered for Honda and Acura B18 and B20 engines, featuring an 81.5mm bore. These performance pistons are designed with advanced valve pocket geometry to maximize flow for oversized valves and high-lift cams, leading to improved intake charge efficiency and greater horsepower. The piston crown shape is optimized for quench during the compression and combustion cycles, enhancing resistance to detonation and pre-ignition, which ultimately extends engine life and boosts horsepower potential. Furthermore, the precision-machined ring grooves ensure excellent ring seal, minimizing blow-by and oil consumption.