When will TRD come out with a supercharger for the 2007 tundra,and does superchargers give better gas mileage or worse?About how much more horsepower and torque did you guys have with superchargers on earlier models and did the gas milage get better?Also does the supercharger make your engine more dirty so oil changes must be more frequent?With a supercharger and exhaust system does the stock catylitic converter hold back these two upgrades or it does not matter?Or is a free flow cat required?