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Technical Features of ZRP Crankshafts Full CNC machining
Fasteners Grade - ARP L19
These rods have “Ribbed pin end” that minimizes pin end distortion under heavy inertial loads while saving excess weight
Bend and twist is tightly controlled
BMW 3.0L N55 I-Beam Connecting Rods F4R Technical Features of ZRP CrankshaftsThe I Beam Connecting rods for BMW 3. 0L N55 are built from the finest raw materials 4340 high tensile steel with a specially optimized shape for high performance and extreme durability. These feature straight cut pin end for increased durability, so they can only be used in conjunction with aftermarket pistons. The bushings are made from AMPCO 18 material, for excellent resistance to wear and fatigue and have radial groove acting as an oil reservoir.
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