I've done the Dinan Software upgrades with throttle body. The exhaust was too much for my liking so I went with deleting the resonators and replacing with an X pipe. Those mods alone gave my 3.0i a little more life in the mid and high range of its power band. No dyno slips but the car moves with less effort than before.

I have ordered TMS pullies and have yet to install them. I dont expect a huge increase in power, but enough to consider my purchase worth it.