The Carrillo BMW N54B30 Pro-H 3/8 CARR Bolt Connecting Rods (Set of 6) are designed to provide superior performance and strength for high-performance engines. They feature a 3/8 CARR bolt design that is stronger and lighter than traditional designs, allowing for greater power output and improved durability. The rods are made from high-strength steel and are shot peened for increased fatigue life. The rods are also balanced and heat-treated for improved reliability and longevity. These rods are the perfect choice for any high-performance engine build.