GT40 or Truck upper?
 

I have a 347 short block with ported polished performer heads, Cobra ported polished intake, BBK 1 3/4 long tube headers.

I would like to know if I should replace the Cobra upper with a GT40 or Explores truck intake. Please advise.

Thanks
Red Rider

Why don't you just port the hell out of the cobra intake that you have? I'm not sure, but I heard that the cobra upper will flow more then the gt40 if you get it fully ported. That will save you money for more mods.

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blown347,free breathing heads and exhaust, solid roller cam, tremec,moser axles, 4.10's, role cage and all the other stuff.
11.8 @ 115 very untuned

from whatI understand, the explorer is about the same as the Cobra, both of which flow more than the GT-40 which is a little more of a torque / mid-rpm range manifold. If you really want to do something with your Cobra, check into having it extrude-honed.

I thought that you could not put an Explorer upper with a Cobra lower...

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White 1995 Mustang GT
Dynomax Cat-Back
Custom H-pipe
K&N Filters w/o Air Silencer
My 1995 Mustang GT

The Explorer, Cobra, and GT-40 all have the same lower intake, GT-40 lower intake. So the three uppers are interchangable

I used the GT 40 upper intake and was not very impressed compared to the Cobra "Extrude Honed" intake. Comparing the two I did managed to get another 15hp out of it. I had them gasket match to a Felpro 1250 and had the Edelbrock heads ported to match. The GT40 is a nice looking intake, but you can't do much with it.

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89 (GR40 Griggs)Hatch
89 Coupe
90 Coupe