you need exhaust to go along with that. ported manifolds and a downpipe. or headers. and i wouldent go with a kit. just my opion. i think it might be cheaper just to buy the items yourself. plus you get what you want. you can save money in one area and spend more in another area. like make your own intake, and then spend the extra money on headers. but for a 3.4 i would say, intake, exhaust, pcm, and colder plugs. the t-stat is not needed