This F150 rear block kit not only lifts your rigs height but it also provides an equal distribution of weight when you are towing heavy trailers and equipment. The rear block kits are made for those who travel with personal belongings, work equipment and more in tow for long or short distances while giving your rig a balanced weight to not strain your engine, or other components. Pair your rear block kit with other high-quality accessories such as the F150 air bags and air helper spring kits or F150 coilover packages. Ford F-150 Fitments: 2009, 2010, 2011, 2012, 2013, 2014 Ford F150. Submodel Fitments: FX2, FX4, King Ranch, Lariat, Limited, Platinum, STX, XL, XLT. Some Exceptions apply, please see individual product pages for specific fitments.