Well bro its not really hard! im sure u want ur car to sound good so first things first! get a o/r H pipe with flowmasters and 2.5 tips! that will make u sound like a mean v8! the off road h pipe is an essential. now for speed! pick u up a predator diablo. there not cheap. that in combined with 3.73 and posi tract will make u out run a gt any day of the week. i got mine of ebay used with the t lok (posi tract). just type in ford 3.73 w/ posi tract! the mustang v6 is interchangable with a ranger rear end. anyway before all that get u a mac cold air intake! youll love the turbo sounded whistle between gears! everybody will think u have a supercharger lol! thats why MAC is the best one. its 160 bucks but worth it! anymore questions ask me or email me at franchise40@yahoo.com! i dont check this much!