Bestop PowerBoard Retractable Electric Running Boards 75143-15 Extends down automatically when door opens , retracts up when door closes;6.25 inch extra wide step ;Sturdy, cast aluminum alloy arms allow step to descend up to six inches; All PowerBoards feature an integrated light kit; Each PowerBoard can hold up to 600lb load capacity PER SIDE and have been climate and salt spray tested to operate in any climate; 3 year/36,000 mile limited warranty; Extension arm is available to provide an additional 2 inches of height for lifted trucks DODGE 1500 RAM 1500 BIG HORN EXPRESS LARAMIE LARAMIE LONGHORN LONE STAR OUTDOORSMAN SLT SPORT ST TRADESMAN TRX TRX4 2009 2010 2011 2012 2013 2014 2015 2016 3.6L ERB (220) Pentastar 3.7LMagnum (226) 3L EXF EcoDiesel (2987cc) 4.7L Flex Power-Tech (285) 5.7L Hemi EZD (345) 5.7L Hemi EZH (345) DIESEL FLEX GAS Bestop Bestop PowerBoard Automatic Running Boards (Black) - 75143-15 75143-15 Power Running Board