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Air Flow Research offers a wide range of aluminum heads for small-block Fords, from these 165cc street heads all the way up to 225cc race-ready heads for big-inch strokers. Flowing approximately 245 cfm on the intake side and 185 cfm on the exhaust, the165s are named for their 165cc-volume intake runners, which provide the ideal balance of flow and velocity for street-type engines up to about 310 ci. The next step up is the AFR 185, ideal for 347ci and larger engines. We chose PN 1472, which is emissions-legal in all 50 states. View Related Article
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