When all the gang members sit together to count money using automatic counting machines, the crew had to use original currency worth INR 25 Lakhs. It was needed because the counting machine automatically detects fake notes and throws them out.
The female voice singing acoustic on tape belongs to Pooja Surti, the editor of the movie. The song ("Mora gora ang layi le") is from Bandini (1963) starring Dharmendra, who plays Seshadri in this movie.
The film has multiple references to Amitabh Bachchan classic Parwana (1971) and also shows scenes of a major plot sequence of the movie.
The use of the color red in many frames was merely a whim by cinematographer Murlitharan. He thought it would add a nice edgy, pastiche touch to the movie. For the sequence introducing the character of Vinay Pathak, they couldn't find a suitable "red" prop and used tomatoes in the background.