Ebay CAI

[Seorsum]

Whats the difference in a 2 piece CAI kit and a 3 piece CAI kit? More specifically these:
2 piece (http://www.ebay.com/itm/BLACK-BLUE-1999-2000-2001-2005-PONTIAC-GRAND-AM-ALERO-3-4-COLD-AIR-INTAKE-KIT-2p-/370750613693?pt=Motors_Car_Truck_Parts_Accessories &fits=Model%3AAlero&hash=item56527568bd)
3 piece (http://www.ebay.com/itm/99-00-01-02-03-04-05-PONTIAC-GRAND-AM-OLDSMOBILE-ALERO-3-4L-V6-COLD-AIR-INTAKE-3-/370618421295?pt=Motors_Car_Truck_Parts_Accessories &fits=Model%3AAlero&hash=item564a94502f)
Other than the price obviously.

[sleepyalero]

its just an additional pipe, it takes out your "acordian" hose that your iat sensor and stuff go into, and replaces it with a pipe to match. it already has holes/gromets for your iat and vaccuum and stuff.

me, i never liked the 3rd pipe so i just stuck with a 2 piece.