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tubman · 10-28-2020, 09:32 PM

Actually, I don't think they came as a "set". They made caps for the front of the passenger side exhaust manifold. If you look at a stock 8BA passenger side exhaust manifold, it looks like it would flow pretty well (probably better than the "center outlet" custom manifolds shown). Short of a "Fenton-style" header, I don't think there is any improvement in flow to be had on the passenger side.

Anyway, most people agree that duals on a flathead are more for sound than performance..

10-28-2020, 09:32 PM	#8
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 10,303	Re: exhaust manifolds Actually, I don't think they came as a "set". They made caps for the front of the passenger side exhaust manifold. If you look at a stock 8BA passenger side exhaust manifold, it looks like it would flow pretty well (probably better than the "center outlet" custom manifolds shown). Short of a "Fenton-style" header, I don't think there is any improvement in flow to be had on the passenger side. Anyway, most people agree that duals on a flathead are more for sound than performance..