Could someone please point me to the thread or give me some links for high output alternators. I looked through the archive but must have missed it. All the links I found were for domestic makes. I want to add a better stereo system and extra lighting such as 100w FF1000's and dont want to risk shortchanging the rest of the electrical system. I was planning on adding an Optima Red top and extra grounding at the same time. Or is this not necessary for what I want to do?

Here is some info I came up with in my early research. Something in here should help.

http://forums.nasioc.com/forums/showthread.php?t=713891
Vehicle Charging System -
The vehicle charging system is what provides electrical power to everything; including all of the car audio equipment and most importantly the amplifier. There is a ton of technical detail I am not going to try and go into here, but the important point to consider is that there is a limited amount of power available for using car audio amplifiers (for more information on the vehicle charging system go to www.BCAE1.com section 42. Charging System Basics). Trying to push 3000 Watts of power isn't a good idea with everything else stock. Even moderate amounts of extra drain from the system from any amplifier can cause a shortened lifespan of both the alternator and battery. There are some options for improving the charging system though.

One is upgrading the battery. This is mostly for people who like to play their system without the engine running. If you are cranking the music with the engine off, all of the power is being drained from the battery. The stock batteries are unhappy with having this done too much. A deep-cycle battery holds up much better to repeated draining. The most common choice for deep-cycle batteries is Optima; specifically the Yellow Top series. The Red Top series is a step down in terms of ability to be deep-cycled, however it is a little better at cranking. Some people feel that Optima batteries are overpriced and prefer others such as Orbital batteries. My preferred on-line vendor for Optima batteries is www.RemyBattery.com whose shipped prices are still cheaper than most local stores shelf price. The correct size to keep things standard would be the "Group 35" batteries.

For alternators, there are a couple of choices. Either replace your alternator with one that has higher output, or have the stock alternator rebuilt for higher output (typically referred to as having it "rewound"). One direct method for WRX owners to buy a new HO alternator is
http://www.2kracing.com/product_info.php/products_id/2650
Two other places that have consistently done good work are
http://www.mechman.com/home.html
http://www.ohiogen.com/
A third option for replacing the alternator along with a lengthy discussion on this topic can be seen here
http://forums.nasioc.com/forums/showthread.php?t=583790

Discussion on upgrades of the "Big 3" or grounding kits in regards to car audio should be mentioned now. There are definitely benefits gained at times when doing this. And with any sort of high power audio system, a car's charging system can use all the help it can get. I am not claiming a gain of 10HP or anything, but it can possibly help quite a bit with dimming headlights and keeping your charging system healthy longer. If you a are made of money feel free to buy a grounding kit from someone like Lineage; otherwise I would suggest just searching around and doing it DIY style. There are plenty of threads on NASIOC and over at Scoobymods.com that cover the materials and how to do it. Just remember that there are the three critical connection points that make the biggest difference (explaining the name of the "Big 3" or "Magic 3"). First is the Battery negative to chassis. Next is the alternator to battery positive. And last is the chassis to engine. Below are links to some Big 3/grounding mod examples...
http://forum.sounddomain.com/forum/ultimatebb.cgi?ubb=get_topic;f=5;t=007801;p=
http://www.scoobymods.com/forums/showthread.php?threadid=2002

offset

cool thanks for posting :)

That is pretty cool; thanks, Offset.

I've got an Odyssey mounted under my seat and 4 aux lights up front. The time for me to get an uprated alternator is nigh.