The AMP Research PowerStep XL(TM) automatic electric-powered running board is designed for lifted trucks. The board has been integrated into a custom rocker rail and creates a seamless look while providing a 3" lower stepping surface than the original PowerStep(R). This allows easier access to and from the vehicle's cab. Learn about the PowerStep XL and its features and benefits in this new video. PowerStep XL Electric Running Board, Offers 3 Inch Additional Drop, fits 21 F-150 Crew Cab Only 2021 Ford F-150 King Ranch SuperCrew Cab Pickup, 2021 Ford F-150 Lariat SuperCrew Cab Pickup, 2021 Ford F-150 Limited SuperCrew Cab Pickup, 2021 Ford F-150 Platinum SuperCrew Cab Pickup, 2021 Ford F-150 Police Responder SuperCrew Cab Pickup, 2021 Ford F-150 Raptor SuperCrew Cab Pickup, 2021 Ford F-150 SSV SuperCrew Cab Pickup, 2021 Ford F-150 XL SuperCrew Cab Pickup, 2021 Ford F-150 XLT SuperCrew Cab Pickup