• Aerospace - Grade 4340 Chromoly Steel: Ensures high - performance and reliability for boosted engines. • Precision Machined: CNC machining and micropolished finish for top - notch quality. • Exact Tolerances: Equipped with Aluminum/Silicone/Bronze pin bushings and finish honed to tight tolerances. BMW M50 Series ProH625+ with ARP Custom Age 625+ Fasteners. These BC high - performance connecting rods are made from aerospace grade 4340 chromoly steel, allowing you to safely increase boost, use nitrous, and expand the RPM range. Every rod undergoes CNC machining and micropolished surface finish treatment. It comes with Aluminum/Silicone/Bronze pin bushings and is finish honed to exacting tolerances. Technical Specs: C - to - C: 5.315', BE Bore: 1.890', BE Width: 0.862', PE Bore: 0.8661', PE Width: 0.862', Gram Wt: 505, Torque Specs: 55 ft lbs - 3/8'.

These connecting rods are perfect for BMW M50 Series engine enthusiasts who want to enhance their vehicle's performance. Whether you're into drag racing or just want a more powerful daily driver, these rods can handle it. They're made from high - quality aerospace - grade steel, ensuring durability. With a length of 5.315' (C - to - C) and weighing 505 grams, they fit precisely in your engine. The torque specification is 55 ft lbs for the 3/8' size, making installation straightforward.