1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

s4 exhaust mani...

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Old 04-22-04, 09:20 PM
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s4 exhaust mani...

ok, got my s4 exhaust manifold in today. i know i need to oval the holes and all for it to fit on my 12a, but what do i do with that damn flapper? remove it? how does it work? thanks ,

-zac
Old 04-23-04, 07:17 AM
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anyone?
Old 04-23-04, 12:28 PM
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Yeah, you can take out the flapper.

It's purpose was to direct all the exhaust through one of the turbo runners at low engine RPM, which helps spool the turbo a little faster. Unless you have the actuator it will just flop around.
Old 04-23-04, 12:46 PM
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awesome, how do i take it out though? hahaha cut it? will my turbo spool less quickly though? everything that can be has been ported on it.
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