The ICON Vehicle Dynamics 1 Cast Block Kit is a simple solution to tune the rear ride height of your vehicle. These heavy-duty lift blocks provide 1 of rear lift on vehicles that do not come with factory rear blocks, such as the 2016-2023 Nissan Titan XD. They are also conveniently paired with the 2008-2024 Ford F-250/F-350 2 Lift leaf Spring Expansion Packs to maintain near stock ride height with a significant ride quality improvement and reduction in axle wrap compared to the OE leaf spring/block combination. These cast iron lift blocks include center pins for an easy install and are painted semi-gloss black for corrosion resistance.