Now it all makes sense:
Team Joest has purchased two Multimatic Daytona Sports Prototype chassis for the 2003 Grand-American season. (They won't be ready in time for the Rolex of course.)
The cars will be powered by a 4.8l version of the Volkswagen Passat "W8" engine, and will probably be labelled "Jetta DSP".
Wow, what an upset...