While waiting to ambush Rufino in the train yard, Sam and Harlan are hidden in the train car. Sam calls Harlan "Hercules". Bruce Campbell played Autolycus on the long running series.
When Michael gets into the SUV for the meeting with Rufino, he says, "I like these SUVs. They're roomy." This is a callback to when he was forced to ride in the back of a Mercedes sedan between two gunmen and says, "You know, Mercedes makes an SUV now. They're roomy and surprisingly affordable."