Kute korbowody ZRP Watercraft Kawasaki Ultra 250 260 400 H-Beam R-KAW-001H - ZRP-R-KAW-001H - Kawasaki Watercraft ULTRA 250 / 260 / 400 H-Beam Connecting Rods are manufactured from 4340 high tensile steel and are designed for high performance and extreme durability. The bushings are made from Aluminum – silicon/ bronze Aluminum – silicon/ bronze material and have radial groove acting as an oil reservoir. These rods have “Ribbed pin end” that minimizes pin end distortion under heavy inertial loads while saving excess weight. They are shot peened to relieve stress from the material and multi-stage heat treated to increase rigidity. The tight tolerances in the production process, ensure a perfect fitment while optimizing the oil clearances. Bend and twist is tightly controlled. Each rod includes ARP 2000 cap fasteners that are rated at 220,000psi, optional ARP Custom Age 625 material 260.00psi available as an upgrade and the whole kit is supplied with ARP moly and full fitting instructions.Additional machining processesDowel sleeves for perfect fit and accurate re-assembling Lipped Cap Relief for improved big-end integrity at extreme application Grooves in Thrust Face for weight reductionTechnical Features of ZRP Connecting RodsAluminum – silicon/ bronze bushing with radial groove.Two-Piece forging for great strengthShot Peening for improved fatigue lifeMagnaflux Inspection guarantees that the consistency of the forged material meets our high-quality standardDouble ribbed caps for added support Multi Stage Heat Treatment for maximum strength, dimensional stability, and fatigue life.CNC machining for superior tolerances, precise as much as 0.0002"Center to center is maintained under .001" toleranceFinite Element Analysis (FEA) Computer generated stress analysis of con rodsOptimal balancing for weight matched sets of ± 1gram