Hellyeah are a finely tuned hard rock machine and the outfit is working on its fourth studio album in seven years, with a tentative late April release.

Drummer Vinnie Paul has elaborated on the band's current progress.

According to Classic Rock magazine, Vinnie Paul said: "It was an honor working with (producer) Kevin [Churko]. He really pushed and got the best out of us. Everything we did on this record was from a different perspective."

Paul went on to call the band's latest work "heavy and diverse" and their "very best" music.

Churko also chimed in, adding: "They've really impressed me both with the tracks they brought in and with their drive to make them even better. I think they'll really be delivering their best record yet; 2014 will be the year of Hellyeah."