WEC 13: Heavyweight Explosion was a mixed martial arts event promoted by World Extreme Cagefighting on January 22nd, 2005 at the Tachi Palace Hotel & Casino in Lemoore, California. The card featured a 4 man Heavyweight Tournament featuring Brandon Vera as well as single fights which saw the likes of Jason "The Punisher" Lambert, Brad Imes, and MMA legend "Mr. International" Shonie Carter compete.

Release Date: 22nd January 2005