ZRP Bielle Toyota 4AG 16v /20v I-Beam

The I-Beam Connecting rods for Toyota 4AG 16v / 20v are manufactured from 4340 high tensile steel, they are designed for high performance, extreme durability and extra rigidity. The bushings made from AMPCO 18 material for excellent resistance to wear and fatigue and have radial groove for oil reservoir. 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 220,00 psi, optional ARP L19 material available as an upgrade. The Connecting rod kit supplied with ARP moly and full fitting instructions.
Note: The big end diameter is 45.00mm

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
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