I installed a wilson manifold plate/intake on my 06 (see sig) and so far I am impressed with the results, lower egt,s maybe 80 to100 deg. ,more power for sure (i can slip the clutch on sw. 2 in 4th 5th 6th with about 2/3 throttle, before it took nearly full throttle if at all on sw. 2 smarty ) much less black smoke and almost no grey haze. I dont know about fuel mileage yet,but it sure feels better so far. I have tried many different products and most get returned or sold used, so when i find something that seems to really work I feel I should pass the word. Other than my pac brake and my smarty this is one of my best mods. so far.