In Halo 3, Halo 3: ODST, and Halo: Reach, the Warthog's tires are printed with the word PUMA. This is a reference to an episode of Red vs Blue in which Simmons
Halo Puma : r/Crossout
Halo on Twitter: "The Warthog is the UNSC's primary ground transportation vehicle. Developed by AMG Transport Dynamics and generally used for transportation, Warthogs also offer extremely versatile anti-aircraft or anti-armor combat solutions. #