[LMJD]

Like posted, there's a tremendous amount of difference in power, especially when pulling a heavy load which a diesel is designed to do. If you live at or tow at high elevation there's even more difference. Non-turboed at high elevation, the higher you climb the more power is lost out the tailpipe in the form of black smoke. With a turbo, pretty much the same increased power even at 9000ft and no smoke. Although ATS sells turbo kits so therefore promotes them, as a mechanic I have to agree with their statement from years back, a diesel engine by it's basic design is made to be turbocharged. Even old loaders, graders, etc, for max efficiency have always been turboed.