Okay, How did I miss this tread till now??

First off I work at a Toyota dealership and drive a Chevrolet. The Tundra is a great truck with a nice amount of power from the factory. Personally I think what holds back Toyota aftermarket is the lack of a way to tune them. Toyota will not even let the dealerships know how the computers work table wise. We have to call a tech center in California and fill out forms in order to fill out the form to order a new calibration file. Then all we can do is flash the new file into the vehicle. NO Calibration viewer or modifier available. By the way this all cost about $600 a flash. Heck even a lot of the Toyota Supra guys have to run aftermarket PCM. It is very unlikely to see a I Force 5.7 transplant due to the 15 integrated computers that have to communicate in order to keep it running and all systems friendly with each other.

Chevrolet will always supply a way to tune their vehicles and aftermarket parts. Don't forget that the big three grew up on racing and competing with time slips.