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.
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.
CARB ApprovedThis aftermarket part has been granted an Executive Order (E.O.) and is approved for sale and use on motor vehicles by the California Air Resources Board (C.A.R.B.). In addition to California, this part is also legal in those states having adopted California clean air standards.
California Residents: Cancer and Reproductive Harm WARNING www.p65warnings.ca.gov