I have the same stock amp alt... drop a 2400 in the back and run 1/0 hood to bat then run wires from bat to amps and your good... no dimming no problems
cheapest route and best for your system and car.
PS http://www.ddboner.com on the for sale thread there are 2400 for 250 shipped good investment IMO
You should be able to fit an Odyssey 2150 or Kinetik 2400 under the hood....and run 2 runs of 1/0 cable one power one ground to a 2nd matching battery then goto amps...you'll be fine then //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif