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Old 06-22-2006, 05:17 PM
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Exhaust Cross Connections Other Than X or H?

Is there any reduction in noise or drone by installing a interconnecting pipe between true duel exhausts that is neither an H or X, but more like a U?

There is no room in my 1939 Olds chasis to use an H or X in the true duel setup (2.25 inch pipes through IMCO passenger mufflers). But the Olds V8 engine originally had a crossover pipe from the drivers-side exhaust manifold to the passenger side exhaust manifold. The inlet to the passenger side was blocked when installing the duel exhaust and the crossover pipe was tossed.

I am trying to reduce the drone at about 1500 rpm and was considering asking the muffler shop to install a crossover pipe from the drivers side below the exhaust manifold to the old inlet to the passenger side exhaust manifold.

Or, just weld a crossover pipe between the two exhausts pipes-- the corssover would go under the shallow part of the oil pan where the original pipe ran. More like a 2 foot "U" pipe.

Anyone have have experience like this?

John

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Old 06-23-2006, 05:08 AM
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It's certainly worth a try and I don't see that it could cause any harm if it doesn't help other than lighten your wallet a little.
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Old 06-23-2006, 06:04 AM
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So you'll have a "U" shaped "H" Pipe...
Mark
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