Re: 3.9 = 3.8?
all parts will fit for the most part! now when u get to buying a tuner it will be a lil tricky! i know with my predator i had to download a program from there website so it could program mine 3.9! im not sure how other name brand tuners will work! just contact each seller before completing the transaction to make sure it will fit! that way if he says yea and it doesnt you will be able to get a full refund! Good luck bro!
04' mustang 3.9 40th Anniversary Edition- (V2 Vortech Supercharger, 38# injectors, 3.73 gears w/ T-lok, Predator Diablo, Mac cold air intake, Port & polished upper AND lower intake manifold, Mac Long Tube Headers, Mac o/r H pipe, flowmasters, 2.5 flowmaster tips)
03' Mustang GT (20" Cobra R's, 40 series Flowmasters)