Hey, just got an 08 Chevy 2500HD 6.6L turbo diesel truck and it needs mods. I know with these trucks you can easily rack 100 hp out of just a handheld tuner because of the turbo. I just dont know any good sites that sell parts for trucks. I know for mustangs theres steeda roush, saleen, etc. But whats the "steeda" of chevy trucks? Anybody have a few good sites that sell performance parts for trucks? Ive been looking but cant find much for an 08 silverado.

thanks!