TRD’s stunning supercharger system is a very popular upgrade, and for very good reasons. Legal in all 50 states, the state-of-the-art Roots-type blower unit adds an estimated 75 horsepower to the Toyota’s 3.4L V-6 engine, plus an additional torque gain of 77 lb-ft. The kit from TRD is complete with all of the installation hardware, a detailed set of instructions and a newly revised dynamic belt tensioner. All of these items are of O.E. quality, and all can be used without screwing up the truck’s factory warranty.