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8-Cylinder Tech If you are one of the few with a V8 engine in your Ranger, or if you dream of a Ranger with a V8 engine, this is the sub-forum for you.

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Old 11-13-2009
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Join Date: Nov 2009
Posts: 16
Icon5 Heads

Ok I have been looking for heads for my 5.0 Mustang and I know this is a Ranger site but people get the 5.0s. I am looking for the GT-40 heads and my understanding below a 97 has the GT-40 and above has the GT-40P. I am wanting to know which ones are better and if there are anymore parts from the explorer 5.0 that I could use to build my motor for cheap, thanks alot. Explorerforum no one has replied in days.
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Old 11-13-2009
sniper_101's Avatar
Join Date: Jul 2005
Location: Sask, Canada
Posts: 1,902
96/7' use GT40's, the same as Cobra GT40 heads, mild improvement over E7's and you don't need to use special headers.

98'+ use the GT40Ps, they bump the compression slightly, have better plug location for better combustion and do make a bit more power/flow more than GT40's. You need GT40-P specific headers to use these heads and new plug boots on the wires.

As for other stuff, the upper and lower intake from Explorers are an upgrade from stock Mustang intakes as well. They flow almost identical to Cobra and tubular intakes which cost $100's more, but you do need to configure the EGR to your application.

I can dig up some links on this later, but here is a Mustang site that you should check out for some more/better detailed info: Corral
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