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Are the manifolds changeable? I mean, can I take a High port manifold off the JDM motor, and put on my Low port? I was told yes, no problem, but then just recently, I was told that you would need to swap the head. Is this true? If so, why?
 

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You have to change the heads. On the high port, the intake ports are pointed upwards, and on the low port, they are flat.
 
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