We traded our 2005 Tacoma for a 2005 Tundra with 80K last April. Truck has the 4.7L with auto transmission (Access Cab). Just put on about 2K miles with the ATC Ocelot and found the power and braking fine. Interstates, two lanes and slow back roads. Averaged 14 to 15 mpg depending more on passes than speed it seemed. So far, so good (did put Michelin LTX AT2 tires on also).