• Armor Coated With High Pressure Polyurethane Bed Liner Material
• Increases The Base up to four times stiffens the wood and no air leaks
• Life Time Guaranty
• Fits Ford F150 Extended Cab Or Super Crew Cab 04-2008
• 2-10'' Speakers
• Down Firing System
• Air Volume .56 Cubic Feet Per Side
• Mounting Depth 5.5''
• Material 5/8'' M.D.F
• Jack Need To Be Relocate