Head changing kit allows installation of 5.2L Coyote cylinder heads on 5.2L block-see tech notes below Fits Ford Performance M-6010-M52A "Gen 2" 5.2L Coyote Aluminum Engine Block and M-6010-M52B 5.2L Coyote Aluminum Engine Block Includes multi-layer steel head gaskets Includes increased length, 12mm head bolts provide greater clamping force than previous 5.2L bolts Kit includes 20 high strength torque to yield bolts 187mm long Notes: Does not fit 2015-2018 5.2L or Ford Performance M-6010-M52 Engine Blocks, see M-6067-M52 (131mm long)