Collection: Drivetrain & Transmission
True to their name, the 4" bore 107 inch El Bruto engines are horsepower extraordinaire. They are the most powerful EVO configuration of these sizes. These brutes have features which ensure long life and pure riding enjoyment for those who need ultimate performance.
Ultima performance carburetors are directly interchangeable with S&S Super G Carburetors. Ultima carburetors will accept S&S jets and S&S bolt pattern air filter assemblies. Their relocated accelerator pump nozzle has increased throttle response and thunder jets are bolt on. Simply remove the plugs and screw in the Thunder Jet. No expensive machining required. This 6-speed transmission is complete, and ready-to-install Fits Harley Davidson Softail frames and custom application.