Quick view AMP Research AMP Research 2004-2007 Ford F-250/350/450 SuperCrew PowerStep XL - Black - 77104-01A Compare $2,299.99 $2,099.99 Amp Research PowerStep(TM) XL Running Boards take the style and convenience of traditional running boards to the next level. As the name implies, these automated boards extend when your cab door is opened and tuck away when the door is shut. The... Add to Cart Add to Cart