There's no incentive to sell dpi's. Only to GM (Cadillac). I bet there's more to it behind the scenes. Why is there's 6 Caddy's and only as many of the others
combined? Imo, the other's have joined in on something that was planned by GM and IMSA. I would say they were the ones who created this idea and with Dallara, made a dpi car a long ways before the others. The Dallara lmp2 is probably based off the dpi instead of the other way around
