, I was wondering if I could get away with using the stock

cast iron manifold with a straight pipe attached to it, which

would exit

through the bottom of the cowling.

Peter Cowan/Lexy Cameron wrote:

Another guy that used the stock manifold with a short pipe was Andy
Venable. He clained it was no louder than any other aircraft. There
are at least three different stock manifolds. His was a large one
with short inlet tubes and a baffle before the outlet.

Here is a picture of Andy's and one of the smaller ones:


I was going to try it on mine but I'd have to mount it down-stream
because my motor mount bolts on between the exhaust ports.
Peter

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