[silver]

what do you consider a fart can? i hate that term, people go around calling hks, apexi, and tanabe fart cans...the tone is not completely dependent upon the muffler, you have a really low displacement motor, it's going to be high pitched compared to a wrx, or pretty much anything else.

the intakes are pretty much all the same. injen, dc, aem, k&n, those are the major ones.

for a "header" i'd look at dc.

exhaust, go for a catback from a reputable company.

you're looking at probably a grand for all 3 combined.
don't forget about your suspension, get a nice coilover setup, run you at least $800, then you've got all your tie/sway/bar stuff. maybe another $500 for those. <---that's a guess, i haven't been paying attention to those prices. so after spending roughly $2500, decide whether you want to spend more or not.

btw this is all diy, you shouldn't have to pay for any labor.