AFR Cylinder Heads, 5.0/5.8L, 165Cc Stud Mount, 58Cc Combustion Chamber, Assembled - Competition Street Porting

For the ultimate small block Ford street car, you’ve got to use AFR’s 165cc cylinder head. Unlike some aftermarket heads, AFR’s Ford head fits all your stock components; no special parts are required! With 1.90" intake valves, 1.60" exhaust valve, and a combustion chamber volume of 58cc, and 69cc exhaust ports, AFR’s new 165cc Ford head is perfect for 289 and 302 engines operating from idle to 6000 rpm. A .75" thick head deck makes the AFR head ideal for nitrous or blower applications. Will not accept rail rocker arms. Hardened push rods required with part number 1404. Springs are good up to .600" lift. The 1404 cylinder head features the competition package street porting that increases flow and power all through the RPM range. Note: 1986 5.0L must have piston notched for clearance.