Dunkin Donuts and Krispy Kreme are celebrating National Donut Day by giving away free treats but Chevrolet is marking the event with the best donuts they know.

Dunkin Donuts and Krispy Kreme are celebrating National Donut Day by giving away free treats but Chevrolet is marking the event with the best donuts they know. 

These, of course, aren't made with dough but are instead created by their SS race cars which compete in the NASCAR Sprint Cup Series.

Originally unveiled in 2012, the Chevrolet SS race cars feature rear-wheel drive as well as a small block V8 engine.  It's styling closely echoes the road-going variant but unfortunately success on the track doesn't always translate into success in the showrooms.

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Chevrolet celebrates National Donut Day [video]