ZRP HONDA RODS B20 ‘H’ BEAN connecting rods 137.00mm x 21.00mm

”Honda B18A / B18B / B20 H-Beam Connecting Rods are manufactured from 4340 high tensile steel and are designed for high performance and extreme durability. This “Lightweight” design combines lightweight performance with proven reliability at an extended rpm. 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 5/16” cap fasteners that are rated at 220,000psi, optional ARP Custom Age 625+ material 280.00psi available as an upgrade and the whole kit is supplied with ARP moly and full fitting instructions.

Additional machining processes

Dowel 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 reduction
Technical Features of ZRP Connecting Rods

Two-Piece forging for great strength
Shot Peening for improved fatigue life
Aluminum – silicon/ bronze bushing with radial groove.
Magnaflux Inspection guarantees that the consistency of the forged material meets our high-quality standard
Double 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″ tolerance
Finite Element Analysis (FEA) Computer generated stress analysis of con rods
Optimal balancing for weight matched sets of ± 1gram