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Discussion Starter #1
will a gt500 lower and blower fit the navi heads? Got a set for free from a blown up motor and found a good deal on a complete gt500 setup.
 

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11 second street truck
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He's right
 

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11 second street truck
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10,496 Posts
Doesn't matter. Bolt pattern is different. Navi heads are only good for turbo or centrifugal setups
 

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The bolt pattern is the same but Navi heads have a larger/ slightly different intake port...but the pattern itself is the same, hence why MMR coyote intake adapters fit cobra/navigator/gt500 ect heads...apparently there’s an Aussie company making a kit to run 03-04 cobra heads on a 5.4 with a gt500 lower intake though...there’s a post on Facebook about it..
 

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Discussion Starter #8
Id be interested in some more info about the cobra heads and gt500 lower. I got a set of those heads also.
 

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