Tom Long drove the Mazda Heritage Collection 1991 Mazda RX-7 GTO to the overall and GT class ... of what is a new tradition at each year’s IMSA season-opening Rolex 24 At Daytona.

It also reigned as the IMSA GTO champion for a decade, thus proving the Mazda sports car's racing pedigree. However, tightening emissions regulations meant that the rotary engine eventually had to ...

A Swedish Audi fanatic seems to think so, too, and has gone to extreme lengths to transform a workaday Audi 90 into the IMSA GTO version of that car. Not wanting to go the stripe-and-bodykit route ...