The composers also told Digital Spy that Katrina Kaif's performance plays an important function in the plot of Agneepath.
"The song has been sung by Shreya Ghoshal and we wanted a song that was catchy," the duo said.
"In the film, there is a point when the story has to move very fast and Sanjay Dutt (Kancha Cheena) organises a performance for Hrithik's character Vijay. Katrina performs to 'Chikni Chameli' in Mandwa which has been transformed by Kancha Cheena into a very dark village.
"That's why it has a lot of dhol and is a rhythm-oriented song. We needed a dance number and we think we cracked a perfect item number."
The brothers credited actor Ritesh Deshmukh for his part in getting them involved in the remake project.
"Our friend Ritesh Deshmukh was sitting in the office with Karan Johar one day. When Karan told him that he is remaking Agneepath, Ritesh suggested listening to our music," Ajay-Atul explained.
"I think, he listened to the soundtrack of Jogwa as well as Natrang and he immediately got to know what sort of sound we produce. That is how we became part of the film."
Produced by Karan Johar's Dharma Productions, Agneepath releases in cinemas worldwide on January 26.
Watch the 'Chikni Chameli' making of video below: