I have a 2006 Toyota Tundra with a 4.7 engine. Do they make a chip that will give me better fuel mileage? Thanks, Jeff

I've got a "05 Sequioa (or however it's spelled). I put a Magnaflow cat. back on it. Helped a little (2-3mpg). Cold air intake is next (looking at the AFE system).

I believe that to get the maximum effect out of a programmer, you've got to do these things first.

If you've any warranty left to worry about, Toyota dealerships sell the TRD version of these. Using the TRD part is not supposed to void your warranty.