Air Flow Research's BlackHawk Cylinder Heads for the Mopar Gen III Hemi debuted at the SEMA Show. AFR’s Black Hawk Mopar Gen III Hemi Cylinder Heads offer Hemi owners a new clean-sheet design. Manufactured from A356 aluminum using permanent-mold technology, AFR Gen III Hemi Aluminum Cylinder Heads are outfitted with our trademarked .750” thick head deck to meet the boost and power demands of today’s OEM and aftermarket engines. We have improved the water jacketing for enhanced cooling while retaining a minimum of .200” port to water jacket thickness. Designed for use with hydraulic roller camshafts up to .650” of lift, these heads are available in three different versions.