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post #1 of 14 Old January 10th, 2008, 03:36 PM Thread Starter
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GT40 Heads

i have the gt40 intake and i was thinking bout getting the gt40x aluminum heads in the future.. good idea or should i get something different
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post #2 of 14 Old January 10th, 2008, 03:52 PM
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they are way better heads out there these days TFS, Holley, AFR.

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post #3 of 14 Old January 10th, 2008, 05:26 PM
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I just bought a set of trick flow heads dont remember the numbet but it ended in CO1 and they are bad ass they are the cnc ported version they were a little more expensive like 18-1900 but they are sweet....you can get a set of twisted wedge heads for about 11-1200 bucks that are bad ass but gt40's are a good head for the money I had a set and had them ported and polished and they were great
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post #4 of 14 Old January 10th, 2008, 09:01 PM Thread Starter
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ya i thought of some other ones, but i thought it would be cool to have the gt40 intake and heads but i want the performance to
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post #5 of 14 Old January 10th, 2008, 10:48 PM
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ya i thought of some other ones, but i thought it would be cool to have the gt40 intake and heads but i want the performance to
spend a couple hundred more and get some Twisted Wedges...then save some more money and get you a better intake and a nice cam

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post #6 of 14 Old January 12th, 2008, 03:01 PM
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The GT40X heads aren't terrible heads if you can find them decently cheap. I put them on my 95 GT with an E303 cam, Edelbrock Performer intake, and all the other bolt-ons and made 275 rwhp on the first dyno pull completely untined on the stock EEC. They are easily capable of 290 rwhp with a good tune and the right supporting mods.
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post #7 of 14 Old January 12th, 2008, 03:25 PM Thread Starter
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i was going to look for new ones on ebay or check on here if someone is selling them, but im not in a hurry right now because my car is stored for the winter. id like to have them by spring
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post #8 of 14 Old January 13th, 2008, 03:04 PM Thread Starter
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what is the gain from the gt40x compared to other heads
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post #9 of 14 Old January 13th, 2008, 06:32 PM
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better than the gt40/gt40p irons for sure...They are good heads, but they dont flow as good as Trick flow, AFR, Edelbrock.

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post #10 of 14 Old January 13th, 2008, 08:52 PM Thread Starter
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alright thanks, ill look into it further and hopefully buy them soon
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post #11 of 14 Old February 3rd, 2008, 12:22 AM
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alright thanks, ill look into it further and hopefully buy them soon
i'm thinking about selling my brand new gt40x heads i'll let you know if i do.
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post #12 of 14 Old February 3rd, 2008, 02:13 AM Thread Starter
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sounds good if the price is right and if i have money of course...

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post #13 of 14 Old February 3rd, 2008, 08:07 AM
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i have the gt40 intake and i was thinking bout getting the gt40x aluminum heads in the future.. good idea or should i get something different
It depends on what your performance goal is. The combo of GT40 intake and GT40X heads should give you good pulling power up to 6000rpm while still maintaining good low rpm torque. The stock cam with 1.7 roller rockers or a mildish performance cam would work very well with these heads and intake, and 300rwhp is certainly within reach.
The TFS TW, AFR 165, Edelbrock Performer, and Holley Systemax heads will outflow the GT40X heads and yield more HP (TFS TW is the king of this bunch), but the trade-off is a loss of low rpm torque.
Decide where you want your powerband, choose the H/C/I combo that'll get it for you, and gear the rear diff. to optimize performance with that combo.


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post #14 of 14 Old February 4th, 2008, 12:26 PM
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If your interested, ive got a set of TFS Twisted Wedge heads for sale. Complete. Check out the classified section.

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