NOS F77E-AA GT40P Factory Cylinder Heads New Pair for Sale


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Price: $550.00

One set of NEW - never bolted - GT40P heads. Factory markings intact. Purchased in 2003 and coated in Mobil 1. Stored in a climate controlled garage in Albuquerque (very low humidity).F77E-AA GT-40P heads were on early '97-'01 Explorer and Mountaineer V8 engines. They are a favorite of 302 rebuilders.
Real world data seems to show that GT40P cylinder heads, assuming no other mods, are good to add anywhere between 20-40 HP (over stock heads). There are a lot of variables that must be addressed to give a better estimate, but a good basic estimate is 20-40 HP at the crank. Generally speaking, GT40P heads on a mild 5.0L (basic modifications, i.e exhaust, Cobra intake manifold, cold air intake, good air filter) will give a stout 275-325 HP at the crank (230-280 RWHP).
These were originally intended for my '67 289 Mustang, but never made it into the build. My (Mustang's) loss is your gain.
Have questions? Please ask. Need additional photos? Please ask.


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