The Carrillo Pro-H single connecting rod is specified for BMW S65B40 applications and supplied with a 3/8" CARR bolt. Offered as a single rod, it’s intended for professional engine builds and replacements where individual replacement rods are required. The listing explicitly covers E39 M5 and E52 Z8 applications with the S65B40 engine, stated to match those factory engine configurations.
Carrillo BMW S65B40 E-39-M5 / E52-Z8 Pro-H 3/8 CARR Bolt Connecting Rod (Single Rod)