Atomic Billet Crank Sprocket – Ford Barra DOHC | Heat Treated & Case Hardened | Precision Fit Description: The factory crankshaft sprocket in Ford Barra DOHC 6-cylinder engines is prone to wear, noise, and movement under the extreme loads generated by high RPM, big boost, and stiffer valve springs. The Atomic Billet Crank Sprocket solv