straight 6 head interchangeable
#2
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Year: 1990
Model: Cherokee (XJ)
Engine: Renix 4.0
Yes. Depeding on if you take the intake or not you may have to buy some adapters for the tps and iac I think. The renix manifold will fit but the runner size s are not the same as the ports on the head. No huge deal though, it should work that way, though I would think that all that effort to squeeze some extra ponies out would be pointless if you use the renix stuff.
#3
you can port the renix manifold to the same size as the HO head runners. I did it with my old 87. It might have given me one more horsepower so it was really a waste of time on my stock engine.
#4
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Just use a Renix intake/exhaust gasket and your manifolds and you'll be fine.
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