A buddy of mine is parting out a '99 3500 and it has a box plugged into the injector pump all it says is BD power and Von Aken it is about 3. 5 X4. 5. What is it and is it any good? He said I can have it cause he doesn't know either! Do you have to have anything else with it (injectors, exhaust) or will it help by itself? My truck is the same as the one he is parting out, year and trans and gear. Thanks for your help as I have just joined and and am just now trying to learn about them!!