Product updated on 2020-01-21, BDS Suspension - BDS:121409, 2007 to 2018 Silverado / Sierra 1500 Recoil Mounting Kit, , Fully assembled the RECOIL traction bars are 60" long and mount to the vehicle using fabricated 1/4" steel brackets. Bracket kits are vehicle specific. The frame brackets install by drilling mounting holes for the brackets while the axle brackets install