Dan Gurney in the pits at the 1967 Dutch Grand Prix in Zandvoort. Photo courtesy of AAR Archives.

Nissan DeltaWing at the 2012 24 Hours of Le Mans. Photo by David Merrett via Wikimedia Commons.

IMSA Toyota Eagle MKIII GTP. Photo by Moto “Club4AG” Miwa.

Eagle-Weslake T1G at the 2012 Goodwood Festival of Speed. Photo by Jake Archibald.