12ozmouce

I have a 2008 Automatic V-6 Mustang with a dual exhaust and 20" rims, but other than that, it's stock. I was wondering if anyone knew of any performance shops around the Los Angeles area that could take care of her. This is just to get an idea of pricing and quality of work, I plan to start work on the car sometime next year. I'm hoping to surpass GT power, pushing the limits of the automatic transmission. Also, do you think a manual transmission swap would be ideal? Thanks!

P.S. I'm somewhat of a newcomer, so no unnecessarily harsh comments please.