I have a 2001 pt touring and swapped out the air box for a air intake system and all i can say is that is was some of the best money spent for quick hp and better fuel performance... A little blood and sweat(torn knuckle) and i was good to go... The noise that you get is a plus and a minus i guess...the 2.4 sounds more aggressive but it tells everyone you are coming too...Not good for a sleeper... All together I think that you can't go wrong with the air intake and to go further with a stainless header and cat back system you can make alot of noise if you wish and a heck of a difference in cheap overall performance...
