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Registered Engine Abuser
122 Posts
Discussion Starter #1

I have a 95' 5.8L Roller cam EFI Windsor.
I am using the standard Truck upper and lower manifolds (the twin throttlebody style manifold).

Can anyone tell me how good/bad this manifold is? Is the lower half better than the upper half?

What sort of MAX power will this manifold flow?

Would I have substantial power gains by making a box style upper manifold?

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