Team Cunningham scored more victories back home in the U.S., and in 1953 more developed versions of the C-4R and C-4RK finished seventh and tenth respectively at Le Mans, while the new C-5R, long considered the best of the racing Cunninghams, finished third overall, a mere forty-two miles behind the second of two disc-brake-equipped Jaguar C-Types. Reflecting on the event years later, Briggs commented, “Three cars, third, seventh and tenth, in the top ten at Le Mans. I guess that’s not too bad.”

Serving yet another tour of duty in 1954, the two C-4Rs finished at Le Mans in third (Spear /Johnston) and fifth (Cunningham/Benett), while a newly-acquired Ferrari 375MM (Fitch/Walters) retired with broken valve train.