gt40 heads vs. headers
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Senior User
Joined: Oct 2008
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From: Coon Valley, WI
gt40 heads vs. headers
are the gt40 heads worth the power and tourque gains not to put on headers? going on my 95 f150 w/351. or just wait and save up for some aftermarket heads and use headers. a guy i work with builds racing motors, and if i get em, he said he would look over the heads and everything.
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Senior User
Joined: Oct 2008
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From: Coon Valley, WI
ya the heads are dirt cheap... 20 bucks a head. i am buying them anyways, but was wondering whether or not to put them on, because i was under the assumption that both gt40 and gt40p heads required special headers.
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Joined: Jan 2008
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From: Gatineau, Quebec
From what I understand, the "p" heads have an unusual spark plug angle causing issues with removal of the plug if headers are installed.
The regular gt-40 heads have what I'm guessing is a "norma"l plug angle and therefor do not create the same issue with headers installed.
Edit:....Oh and for the price, I would take a good look at them, but that's a steal
The regular gt-40 heads have what I'm guessing is a "norma"l plug angle and therefor do not create the same issue with headers installed.
Edit:....Oh and for the price, I would take a good look at them, but that's a steal
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GT40 heads are identified by 3 vertical bars on the ends and a GT cast into the corner near the valve cover surface, they have 1.84/1.54" valves and flow 20% better than E7's. Externally they are no different than E7's and take the same rockers, plugs, valve covers, and exhaust parts. GT40p heads have 4 vertical bars on the end and have GTP cast into the corners. They have 1.84/1.46" valves and flow 30% better than E7's. They are also the same as E7's externally and use all the same parts except the plugs which are angled differently and have a longer shank. Equal length shorty headers simply cannot be used with this head but most others fit with at most minor clearancing.
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