Posted: Aug 16 2009 at 1:10pm | IP Logged

well i can't see what sub you're looking to add.  But if you're wanting to put it under the seat in the back you're going to need a shallow mount sub.  There's quite a few on the market now as people are buying smaller and smaller cars. 

JL and Memphis both have them.  With those you will need an amp. 

The stock speakers are probably Panasonic, unless you have the RF option (can't quite remember if RF was offered that year )