Ford Racing teamed up with Jon Kaase to redesign their 429 Cobra Jet cylinder heads, and the results are these Super Cobra Jet heads. They feature revised valve angles and locations to reduce cylinder wall shrouding and improve flow, along with redesigned combustion chambers to accommodate the more centrally located valves. These heads use the same valves, valve springs, retainers, and 7/16 in. stud-mounted roller rockers as the current Ford Racing 429 Cobra Jet heads, and the standard Cobra Jet intake and exhaust manifolds bolt right on. This new design offers a 25-50 HP increase over current Cobra Jet heads, depending upon displacement and camshaft.
Super Cobra Jet Heads Ford Racing brings to you the Super Cobra Jet Aluminum Cylinder Heads. Thess big block cylinder heads are the perfect combination to your fit your 429 or 460 Big Block Ford. Ford Racing Designed this latest generation on an old classic name to deliver high output performance in a lightweight, cast-aluminum package. These cylinder heads have been designed to maximize the flow on both the intake and exhaust sides at all lift levels without a reduction in velocity common to large port cylinder head designs. This gives you all that big block low end torque without any loss in midrange or high end horsepower.
What is the valve stem diameter for these?
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