This Subwoofer is made for an 05 subaru STI. Not sure if it works with an 05-06 WrX, but I am pretty sure it does. 120 watt under seat sub with cord to plug into stereo. Just hook to stock stereo, and power cable, and your stereo will sound alot deeper and stronger.

Asking $60 shipped.

 

do you know if all the subies already have the cables ran? are they under the drivers seat? just curious, might be interested, pm me

 

they are already there in my '04 WRX and I don't believe that mine originally had the sub.

 

PM sent to you