Connecting Rod Classic Series I-Beam ZRP for BMW M20 M50 M52 M54

ZRP I-Beam Connecting Rod for BMW M50/M52 Engines

Designed for high-performance and motorsport applications, the ZRP I-Beam Connecting Rod is engineered for BMW M50, M52, and compatible engine series. It is manufactured from premium-grade 4340 high tensile steel, offering exceptional strength and durability under extreme conditions.

Key Features & Benefits

• I-Beam Design: The optimized geometry provides excellent rigidity, ideal for high-power or high-revving engine builds.

• AMPCO 18 Bushing: Features a high-performance bronze alloy bushing with a radial oil groove to enhance wear resistance and lubrication.

• Precision CNC Machining: Machined to aerospace-level tolerances (as precise as 0.0002"), ensuring a perfect fit and optimal oil clearance. The center-to-center dimension is held within ±0.001".

Enhanced Durability

• Shot Peened Surface: Relieves internal stress and improves fatigue resistance.

• Multi-Stage Heat Treatment: Ensures maximum strength and dimensional stability.

• Double-Ribbed Cap: Increases support and reliability in high-load applications.

• Grooved Thrust Face: Reduces weight while maintaining structural integrity.

• Lipped Cap Relief & Dowel Sleeve: Allows precise alignment and improved big-end cap integrity during reassembly.

Fastening System

This connecting rod comes with a single ARP 2000 cap fastener, rated at 220,000 psi. An upgrade to ARP L19 (260,000 psi) is available. Supplied with ARP moly lubricant and full installation instructions.

Quality Control & Inspection

• Magnaflux Tested: Ensures flawless material structure.

• FEA Optimized: Finite Element Analysis used for stress analysis and design refinement.

• Weight Balanced: Designed to match within ±1 gram for use in balanced engine assemblies.

Engine Compatibility

Fits the following BMW engines:

• M20B25

• M50B25 / M50B28

• M52B25 / M52B28 / M52B32

• M54B30

Quantity: 1