Hardee's and Carl's Jr. double down on bacon with the Western X-Tra Bacon Cheeseburger.

CARPINTERIA, Calif. – Two sandwiches served at Carl's Jr. and Hardee's restaurants have received a boost from bacon.

The new Western X-Tra Bacon Cheeseburger and X-Tra Bacon, Egg & Cheese Biscuit feature four strips of bacon while the classic versions of these items feature two strips of bacon. The sandwiches will be available at Carl's Jr. and Hardee's starting March 19, and they are part of the restaurants' tie-in to “X-Men: Days of Future Past”.

Brad Haley, chief marketing officer for Carl’s Jr. and Hardee’s, said a fully-integrated promotion will include new film-themed menu items to a special effects-filled ad campaign starring three popular X-Men characters from the movie.

Haley added that "...since this promises to be the biggest and best X-Men film ever, we’re making two of our most popular menu items, the iconic Western Bacon Cheeseburger and the breakfast favorite Bacon, Egg & Cheese Biscuit, bigger and better than ever by loading them up with four strips of crispy bacon, double the amount we serve on the originals.”

Carl’s Jr. and Hardee’s quick-service restaurants are subsidiaries of Carpinteria, Calif.-based CKE Restaurant Holdings Inc.