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amateur adult film star
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they flow better but i dont know if they bolt up
 

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I dont think they will work
 

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they dont bolt up to the 4.6 block BUT the 4.6 heads bolt up to the 5.4 block
 

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the 5.4 block IS a 4.6 block bored and stroked over. its a direct bolt exchange and swap.
 

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amateur adult film star
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yea but how is it compatible one way but not the other i dont understand
 

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oh my bad i guess i just didnt understand what you were saying at first. i think it fits but if im not mistaken the 4.6 heads flow better than the 5.4 heads. i think you end up losing rpms when you go with the 5.4 heads on the 4.6 block. what i DO know is that 4.6 heads fit with the 5.4 block and you end up getting something like 90tq and like 60hp (ballpark). it just all depends on what you want to do.
 
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