With its mission rooted in winning NASCAR races, the Boss 429 was fitted with cylinder heads sporting free-flowing intake and exhaust ports and Ford's take on the hemispherical combustion chamber ...
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Everything Ford Fans Should Know About The Mustang Boss 429The heads use intake valves measuring 2.275 inches in diameter and 1.895-inch exhaust valves. Ford combined those large valves with equally large intake and exhaust ports, allowing the Boss 429 to ...
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