Friend bought a 05 auto and bought a pac brake for it. The dealer told him it would void his trans warranty if installed on an auto. Which I told him that from the get go. And now he doesnt want it. I can get a great deal on it. I know I'll have to increase my exhaust from 3.5 to 4 at the flange, but is the flange from the down pipe to turbo on a 05 the same on the 03,s ? Does anyone know if there are any differences in the wiring harness from a 03 to a 05. One of the reasons I would like this set up is I would lose the 3.5 restriction in the downpipe. But want to make sure before I dish out the $$$.