Equivalent to the Vortech V-3 Si Supercharger, the NOVI 1200SL features a self-contained lubrication system. The NOVI 1200SL Supercharger comes with an attached oil drain line, so the unit does not have to be removed for servicing. The supercharger uses the quieter helical cut gears (3.61:1 ratio). The NOVI 1200SL Supercharger is capable of up to 775HP on modified vehicles. Extraordinary 78% peak efficiency. Ideal for latest generation of improved breathing, high-power street and strip engines