The Carrillo A-Beam Rod is a lightweight, aerodynamic rod that will get the job done while reducing rotating mass, and improving crankcase widage characteristics. Reducing the mass of the rotating assembly allows the engine to spin more freely with less drag. This lets the engine work more on propelling you faster, and less on turning its clunky components. Carrillo is known for being the best of the best in the connecting rod world. Carrillo is synonymous with "unbreakable". The A-Beam is not their unbreakable rod.