Alfa Romeo 2.5L & 3.0L 6-Cylinders Connecting Rods with L19 bolts

ZRP standard series H-Beam shaped Connecting Rods are manufactured from 4340 high tensile steel and they are designed for high performance and extreme durability.

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 220,00 psi , optional ARP L19 material available as an upgrade. The Connecting rod kit supplied with ARP moly and full fitting instructions

Horsepower range for these rods is 160HP. per cylinder with ARP 2000 fasteners and 175HP with ARP L19 Fasteners.

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

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