The new standard, our most popular supercharger has a self-contained lubrication system. The V-3 comes with an attached oil drain extension so the unit does not have to be removed for servicing. The supercharger uses the quieter helical cut gears (3.61:1 ratio). The V-3 Si-Trim 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.