Hello. Im David Thomas. I have lurked around here for a while but haven't said anything. I am getting ready to start a new job soon and in about 9 to 10 months after I start it, I should have enough moolah saved up to get a decent GXP with low mileage. I am looking at ways to beef it up and I would like everyone's thoughts on it. I should have about $25,000 left after I get the car and that would be my starting budget. Any ideas on how to get to a minimum of 400whp on a 2008 Grand Prix GXP? One more thing. Does anyone here know of a good place to get a custom gas tank for these cars? Thanks.