Shelby FE Aluminum Heads are cast from A-356 aluminum, heat treated to T-6 hardness level and precision CNC machined. Patterned on Ford's famous 427 FE medium-raiser cast iron heads, Shelby FE heads offers leading edge air flow improvements, starting with standards 2.250- inch intake 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. Heads utilize a 14mm diameter,3/4 -inch reach, gasketed spark plugs positioned in the stock location. They are sold in pairs, complete or bare. All Shelby heads are pressure checked.

• Modified intake port short turn radius along with valve bowl area for improved air flow quantity and quality. Ample port wall thickness allows rooms for additional porting.
• Exhaust port floor is raised 0.250-inch for improved exhaust flow velocity.
• Manganese bronze valve guides provide superior heat transfer and oil retention for proper valve stem lubrication.
• A cast-in "bridge" in the coolant passage openings, add strength. Deck surface is 5/8-inch thick.