Afr Mongoose 260CC LS3 Cylinder Heads - Build Your Own

AFR 260cc LS3 Mongoose cylinder heads are 100 percent 5-axis, CNC-ported, and A356 aluminum castings. These CARB certified heads require 4.000 in. or larger bore applications on up through 454 cu. in. engines operating at or below 7,000 rpm. They flow over 380 cfm at 0.700 in. lift and are designed primarily for street and strip applications. Structural features like Air Flow Research's trademark 3/4 in. thick head deck, reinforced rocker stud bosses, and thick wall runners provide unparalleled durability. Choose a hollow stem intake valve, AFR exhaust valve, and a BTR spring kit to improve on an already impressive cylinder head.