Topline Autopart 4" Oval Black Side Step Nerf Bars Rail Running Boards For 04-08 Ford F150 Super Crew (Crew) Cab ; 06-08 Lincoln Mark LT Application: 2004-2008 Ford F150 Super Crew ( Crew ) Cab Models ; 2006-2008 Lincoln Mark LT Models ( Attention Note: Will Fit Models With 4 Full Size Doors That Open In The Same Fashion ; Will Not Fit Super ( Extended ) Cab Models With 2 Full Size Front Doors ; 2 Half Size Backward Doors & Rear Seats ) 4" Side Step Nerf Bars Oval Style Design Tube, Rugged Frame & Mount Design Tube For Strength & Durability Heavy Duty Steel With Black Color Powder Coating, Steel Tubes Maximizes Rust Protection Color: Black