An Audiopipe APSM-4050 amp fits in the stock amp stock location. I'm using it to power the door and center speakers. Specs are 4 X 80 RMS at 2 ohms. I'm using JBL GTO628s (2 ohm) in the doors and an infiniti kappa (2 ohm) for the center. Sounds nice, wish I'd used the same amp in the rear. The stock head unit controls amp turn on as described in another post. I replaced the stock amp because it was getting ignition buzz. The install doesn't look too clean, but it's covered by the kick panel. I had to trim away a little insulation to fit the amp. Here's some pics:

 

Hmm. 4x80 and at 2ohms, not 4. Interesting thread at this time lol


I want to see this play out with all the recent DIY's wanting that extra 15watts magical watts per channel