Originally Posted by maxcichon

Do you have a base (black windshield surround/no foglights)? The base Crossfire has no subs behind the seats. The hole for them is there, though. They can be added.

Those are for 6 1/2" speakers.

The doors also take 6 1/2". I used Infinity 6022i. Very nice. The OEM speakers are no comparison:

Infinity Reference 6022i 6 1/2"- 6 3/4" Reference Series 2-Way Car Speakers

If you strike out on the OEM headunit, I have my old one and will give it up for a low price-just not free. It worked fine when I swapped it out.

The addition of the capacitors is for cars with the rear subs only. Black07 was right. There should be an oval black/gray plastic grill low behind each seat. I'm not sure if the base cars have that hole-you'll have to check it out. Sorry, bud!