06' F-350 upgrades
 

My dad just traded his upgraded 03' F-350 for the 06' F-350 and he's trying to hook it up like the one he just traded. Both engines are turbo diesels but the 03' he had has an upgraded turbo, exhaust, and more. I wanted to know what some good sites are out there for this vehichle to upgrade the engine and performance. He's already doing things to the exterior and appearance.
Thanks:D.