292 Exhaust manifold "flapper valve"?
Do y'alls' with 292's have this spring loaded "flapper valve" in your
exhaust manifold? I believe my engine is a '73, so it may not have been
there on the original engine.
Mine makes quite abit of noise, especially when the idle is under 1000 rpm.
Anyone know what it does, or if I need it? The noise it makes makes it
sound like something in the engine is wrong.
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