2001. 5 HO 6 spd staight piped, western diesel air filter, air box has 4 3" holes cut, 4x4 running 285 75 16 thinking about the TST injectors, think they are 40 hp increase, anyone running them on a stock truck what do you think of them? also thinking of the power edge ez, where is the cheapest place to purchase one, anything below $549 or how about the Western Diesel power box??