2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

S5 Intake Manifolds on S4 block?

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Old Feb 25, 2003 | 04:01 PM
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rx7_turbo2's Avatar
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Professor D.P
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S5 Intake Manifolds on S4 block?

I have a set of S5 upper and lower intake manifolds, any problem bolting them up to my S4 block? I noticed the gaskets are slightly different.

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Old Feb 25, 2003 | 04:09 PM
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s4 for life
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Turbo? Non-Turbo? I know the N/A will bolt up fine. The vaccum system will be a pain in the *** to figure out though.
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Old Feb 25, 2003 | 04:26 PM
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Professor D.P
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Sorry it's for a turbo.

Vacuum system? I have no vacuum system, I tossed all but the essentials. The bolt up pattern on the S4 lower intake gasket is different than the S5 lower intake manifold that's why I'm concerned.
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Old Feb 25, 2003 | 06:45 PM
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Professor D.P
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I believe it will fit with some minor modification.

Can anyone confirm this?

How about the the BAC valve, can I use my S4 BAC valve with it? And does the stock S4 IC fit the S5 manifold?

Last edited by rx7_turbo2; Feb 25, 2003 at 06:57 PM.
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Old Feb 26, 2003 | 01:07 AM
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Professor D.P
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Someone must know this. I put the S4 and S5 lower intake manifolds together and the bolt patern is different so I don't think it will work.

Someone must have tried this already
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