A few? A cold air intake off eBay is almost $250
I just searched for a 2003 Nissan Maxima cold air intake and that is what I came up withApparently you didn't look very hard
$65
http://www.ebay.com/itm/FOR-02-06-A...-SL-/121516285897?hash=item1c4aef5fc9&vxp=mtr
Truthfully they are right the grand prix is a better platform than the Maxima. It has a better and cheaper aftermarket. The 3.8L is much more flexible than the VQ series. If though it wont make as much NA HP it is a monster with boost and it has superior suspension to the 5th gen maxima. Just take it for what it is and enjoy the novelty of the cars. Dont try and argue with people over something that's irrelevant. In the end both us and the grand prix community are driving and modding sh1tty family cars.