Shelby Aluminum FE Heads are cast from A-356 aluminum, heat treated to T6 hardness level and precision CNC machined. Patterned on Ford's famous 427 FE medium-raiser cast iron heads, Shelby FE heads offer leading edge air flow improvements, starting with standard 2.250-inchintake and 1.750-inch exhaust valve diameters.
Due to valve size, the heads are suitable only for Shelby 427 Alloy FE or factory 427 cast iron blocks. These heads utilize 14mm diameter, 3/4-inch reach, gasketed sparkplugs positioned in the stock location. They are sold in pairs, complete or bare.
The 427 FE Bare Heads also come with seats and guides.
(Picture shown is of complete head)