Before the search nazis attack, most people believe that the best intake for the money is a MAF adapter plus a large K&N filter (sorry, don't have the part number but if you search you'll find it). Then buy a plastic bin of some sort and cut it to fit around the intake and add weather stripping to it and you have a nice little heat shield. All this can be done for under $90 easily.
2004 Focus PZEV 2.3L - KW sport suspension, SP camber plates, Eibach front swaybar, FS intake, FS Stealth exhaust, 3.82 Final, Torsen ATB, Prothane MM insert, E1 CSVT wheels
1/4 mile -
15.201@89.4mph
