Aluminum heads reduce weight to improve handling, and when they are precisely CNC machined from a billet blank by Airflow Research, they make plenty of horsepower, too. Choose from heads optimized for street or strip:
251-1472: 165cc / 60cc Combustion Chamber - CNC Street Ported
For the ultimate small block Ford street car, you’ve got to use AFR’s all new 165cc emissions legal cylinder heads. Unlike some aftermarket heads, AFR’s Ford head (CARB EO #250-3) fits all your stock components; no special parts are required! With 1.900 intake valves, 1.600” exhaust valve, and combustion chamber volumes of 58cc or 61cc, and 69cc exhaust ports, AFR’s new 165cc Ford head is perfect for 289 and 302 engines operating from idle to 6000 rpm. A 3/4” thick head deck makes the AFR head ideal for nitrous or blower applications. Will not accept rail rocker arms. Note: 1986 5.0L must have piston notched for clearance.
251-1492: 185cc Heads / 61cc Combust Chamber
If you need the world’s finest street/strip small block Ford head, check out AFR’s all new 185cc intake port emissions legal (CARB EO #250-3) cylinder heads. With 2.020 intake valves, 1.600” exhaust valves, and 69cc exhaust ports, AFR’s new 185cc Ford head is designed for 302-351 cid engines operating from 1500 rpm to 6500 rpm. A 3/4” thick head deck makes the AFR head ideal for nitrous or blower applications. Will not accept rail rocker arms. High flow 2.020 valves might require aftermarket pistons notched for valve clearance. Note: 1986 5.0L must have pistons notched for clearance.
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