GT40 cylinder heads have 3 vertical bars stamped on the side of the head as well as the word “GT”. To verify whether you have GT40 or GT40P cylinder heads, examine the side of each cylinder head. GT40P Head – Mid 1997+ Explorer/Mountaineer SUV Models – Part #F77E-AA (Ford Racing # RF-F87E-9K461-BB) GT40 Head – 1996-Mid 1997 Ford Explorer & Mountaineer SUV – Part #F1ZE-AA (Ford Racing #RF-F87E-9K461-BA) GT40 & GT40P Head Specifications: Head Type Both have 1.84″ intake valves, but the GT40 has a 1.54″ exhaust valve whilst the GT40P cylinder heads have a slightly smaller one at 1.46″. GT40P specific headers are needed unless you use spark plug wires with 90 degree boots to clear the heads.įinally, the last difference between the two are valves. The GT40P heads also had a different spark plug placement making header choice important. The GT40 heads have thermactor holes built in to connect to the EGR/smog equipment whereas the GT40P heads us an external EGR connective system. The 5.0L with the GT40 head had a 9.0:1 compression, and the 5.0L with the GT40P head had 9.1:1 compression. The GT40P heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. The GT40 & GT40P heads had a few differences that are note-worthy, the most importantly being the bump in compression. What Is The Difference Between GT40 And GT40P Heads? GT40/GT40P heads were a more free flowing cylinder head that outperformed the factory E7 heads that were found on most 5.0 Fox Body Mustangs. They were most famous for their debut on the 1993 Cobra. GT40 heads are a factory small block ford head found on a certain vehicles. Ford Explorer 5.0L Camshaftĥ.0L Truck, Explorer Camshaft F4TE-6250-BA The intake manifold is a Ford Mustang Cobra-like “GT40” unit, but it’s been heavily modified and tuned for the truck, so it’s not a direct off-the-shelf swap. They also accommodate different spark-plug angles that facilitate easier plug replacement. The 5.0L became available in the AWD Ford Explorer in 1997.Īlthough the Explorer’s 5.0L uses the same short block as the 1995 Ford Mustang, the heads are described as “hybrids” that incorporate Ford’s best design practices for knock control, emissions, airflow, and fuel economy. For 1997, revised cylinder heads increased output of the 5.0L V8 to 215 hp. It was only available in the 2wd models that first year, and had 210 hp and 280 ft-lb of torque. This page is going to talk solely about the engine itself.įord introduced the 5.0L V8 as an option for the Explorer in 1996. In the past, we’ve shared information about installing a 5.0L V8 from a 1996-2001 Ford Explorer in to your Ford Ranger.
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