ZRP L19 Rods for Nissan RB28

H-Beam conrods for Nissan Skyline RB28 are manufactured from high strength 4340 steel and designed for high performance and extreme durability. Bushings are made from aluminum-silicon/bronze and feature a radial groove that acts as an oil reservoir. These conrods 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 stiffness. 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 head bolts with a strength of 220,000 psi; optionally, ARP L19 material with 260,000 psi can be purchased as an upgrade. The complete kit is supplied with ARP molybdenum lubricant and full assembly instructions. Additional machining processes

Centering bushings for a perfect fit and precise reassembly

Flanged cap relief for increased conrod head integrity in extreme applications

Thrust face grooves to reduce weight

ZRP conrod technical features

Aluminum-silicon/bronze bushing with radial groove

Two-piece forging for high strength

Shot peened for increased fatigue life

Magnaflux inspection ensures forged material consistency meets our high quality standards

Double-ribbed caps for added support

Multi-stage heat treatment for maximum strength, dimensional stability, and fatigue life

CNC machined for superior tolerances, accurate to 0.0002″

Center-to-center distance maintained within 0.001″ tolerance

Finite Element Analysis (FEA): computer-generated stress analysis of connecting rods

Optimal balancing for weight-matched sets of ± 1 gram