Introducing the 5th wheel industry's first SAE J2638 Reese Compliant rail kits, a fatigue and static requirement based on the European style test of 900, 000 cycles. These rails were designed and built specifically for the Reese R16 & R20 fifth wheel hitches, but are also designed to accept other models of Reese fifth wheels as well as most models from Draw-Tite, Pro Series, Hidden Hitch, Husky and Valley. These heavy duty cross rails are wider (48 inch) and install faster because the mounting points of the frame brackets are located on the outside of the truck's frame, allowing the installer to avoid under-bed components. All grade 8 mounting hardware is included.• Will not fit models with Adaptive Ride Control• Will not fit models equipped with CarbonPro bed• Rail measurements - 48" x 5-3/4" x 1-3/4"• Includes: Grade-8 hardware• Does not include: J2638 Mounting Pins & ClipsFitment: 2019ChevroletSilverado 1500New Body Style - Except 8 Ft. Bed2019GMCSierra 1500New Body Style - Except 8 Ft. Bed2020ChevroletSilverado 1500New Body Style - Except 8 Ft. Bed2020GMCSierra 1500New Body Style - Except 8 Ft. Bed2021ChevroletSilverado 1500Except 8 Ft. Bed2021GMCSierra 1500Except 8 Ft. Bed2022ChevroletSilverado 1500Except 8 Ft. Bed2022GMCSierra 1500Except 8 Ft. Bed2023ChevroletSilverado 1500Except 8 Ft. Bed2023GMCSierra 1500Except 8 Ft. Bed2024ChevroletSilverado 1500Except 8 Ft. Bed2024GMCSierra 1500Except 8 Ft. Bed Bolt-On | Reese J2638 Compliant Fifth Wheel Rail Kit