Carrillo BMW S65B40 E90/91/92/93/M3 Pro-H 3/8 CARR Bolt Connecting Rods (8cyl) are high-performance connecting rods designed specifically for the BMW S65B40 engine. They are constructed from forged 4340 steel and feature a 3/8 CARR bolt for superior strength and durability. The rods are designed for use in high-performance applications and feature an increased diameter and a longer stroke length to help increase power and torque. They are also lighter than stock rods, reducing the overall weight of the engine. These connecting rods are perfect for those looking to get the most out of their BMW engine.