Sadly, Big Kahuna Burger doesn’t actually exist
This fictional chain of Hawaiian-themed fast food joins in LA was dreamed up by Tarantino. It first appeared in Reservoir Dogs in the hands of Mr. Blonde, then in this film, then in From Dusk Til Dawn, and Four Rooms & Death Proof.
It’s a shame that Tarantino never actually tried to open up an actual, real-life Big Kahuna Burger in LA. It’d make a killing.