Jack and Kyle Glass release The Pick Of Destiny on November 10.
The album shares the name of their corresponding film, that follows Tenacious D's quest for rock'n'roll stardom.
Starring alongside them in their self-penned movie are Tim Robbins, Dave Grohl, Ben Stiller and in a stroke of casting genius, Meat Loaf as Jack's father
The band head over the Atlantic to play the RDS Arena on December 10 before making their way to the UK.
Tickets are €38.50 and available from September 9.