DescriptionThese Connecting Rods, manufactured by CP-Carrillo, are designed to handle extreme horsepower and high RPM applications for BMW N63/S63 Engines. Constructed from high-strength, aircraft-grade steel, these connecting rods are engineered to withstand the forces generated by high-powered engines. Tapered Rods are compatible with factory pistons while Non-Tapered Rods required aftermarket pistons. Please contact our sales department with any questions to verify compatibility.Each connecting rod is precisely engineered to meet the demands of high-performance engines using advanced manufacturing techniques such as computer-aided design (CAD) and finite element analysis (FEA). The Pro-Xtreme Connecting Rods are designed to be durable, reliable, and capable of handling the extreme stresses and forces generated by high-horsepower and high-rpm engines.Please note that these 138.5 mm connecting rods are designed to fit BMW S63 engine found in the following applications:5 Series F10 / F11 M5 6 Series F12 / F13 M6 X5 Series E70 X5 M X5 Series F85 X5 M X6 Series E71 X6 M X6 Series F86 X6 M
