Don't bother with the exhaust, just get the middle muffler deleted, sounds great and the stock exhaust is good for 300 Do it once do it properly with everything else, get ID1000s straight up for injectors, you'll probably want more than 300 once you get it, get an intercooler kit before doing the battery etc as you might limit your choices depending on who does the piping, most the intercooler kits have all this stuff anyway so no point doing it twice. Budget $6k to do it properly, I made a thread on this recently. http://www.fordxr6turbo.com/forum/topic/88874-300rwkw-in-a-2007-bf-manual-modscost-stock-and-mod-or-buy-modded-example/#entry1495275