The TRD Tundra Double Cab 4x4 Off-Road Concept starts with a 6.5-foot bed. It combines an extensive list of custom features designed to showcase new TRD products on a rugged heavy-duty off-road truck that can be used to pull a large car-hauler trailer. The 5.7-liter V8 engine has been upgraded with the new TRD supercharger system that incorporates an air-to-liquid intercooler that boosts output to approximately 500 horsepower and is 50-state emission legal. The truck uses...