I got all my mods done at DJT Motorsports (313) 895-WELD.
Headers, suspension, exhaust, turbo's or superchargers.
Just ask for Darin. They have NASCAR and SCCA car building and racing experience.
Right now I'm thinking about cuting out my trunk floor and welding in a new one to give me access to my audio system batteries from the bottom of the car. They can do it but then I would need pay for corrosion and painting and I have not found a paint shop I like yet.