ZRP Connecting Rods for Honda H22 A1 H-Beam Connecting Rods

Honda H22 H-Beam connecting rods are made from high-strength 4340 steel and engineered for high performance and extreme durability. This lightweight design combines optimum performance with proven reliability at high RPMs. The bushings are made of aluminum-silicon/bronze and feature a radial groove that acts as an oil reservoir. These connecting rods have a grooved pin end that minimizes deformation under high inertial loads while reducing weight. They are shot-peened to relieve material stress and multi-stage heat-treated to increase rigidity. Strict tolerances in the production process ensure a perfect fit and optimize oil clearances. Bending and twisting are strictly controlled. Each connecting rod includes ARP 2000 cap fasteners which are rated at 220,000 psi, optional ARP L19 material at 260,00 psi available as an upgrade and the entire kit is supplied with ARP moly and comprehensive fitting instructions. Additional Machining Processes Pin Bushings for a perfect fit and precise reassembly Scalloped cap relief for increased big end integrity in extreme applications Thrust face grooves for weight reduction ZRP Connecting Rod Technical Features Aluminum-silicon/bronze bushing with radial groove Two-piece forging for high strength Shot peening for increased fatigue life Magnaflux inspection ensures forged material consistency meets our high-quality standard Double ribbed caps for additional support Multi-stage heat treatment for maximum strength, dimensional stability, and fatigue life. CNC machined for superior tolerances, accurate to within 0.0002". Center to center distance is held to below 0.001" tolerance. Finite Element Analysis (FEA). Computer-generated stress analysis of the connecting rods. Optimal balancing for matched weight sets of ± 1 gram.