Stewart, Smith, whose alter ego TXsilverado, is an obvious cry of his allegiance to his home state of Texas, as well as his project muscle truck. Stewart's '01 Chevy Silverado has been upgraded with an LS1 engine with all of the necessary trimmings such as heads, cam, intake, and nitrous system. Just how much extra power did Stewart receive when all of his engine mods were all wired up and bolted on? Currently, his best time is 11.5@118 on a 125 shot. So far, that is mighty fine progress, but Steware fully intends to to even faster!