Peter Cowan/Lexy Cameron wrote:

Hello Paul C.
I've got three manifolds and none is like yours. It does look
like the original outlet has been blocked off and the current one
added. Bet it doesn't have any internal baffles. With no baffles
and low volume, I'd bet it does little muffling. Aside from the
reduced power of these short systems, I'd pay a little weight
penalty for the simplicity and ruggedness IF one did a half
decent muffling job but I think you need the bigger, baffled
cannister to accomplish that.  Tracy is right about the weight
but it is the weight difference between the two approaches that
is of interest.
Peter

 Thanks, Peter....I will probably use the stock manifold.  I have two of

them, and the smaller one weighs around 14 pounds.  Add a 10 inch pipe, and
we may have 14 1/2 pounds.  I don't know what the Spintech muffler weighs,
but if I can get adequate performance, tolerable noise levels and have an
exhaust that won't crack or break up and boil my fuel out of the intake
manifold, or go through my prop (pusher), I'll call that a success story. I
doubt my cast iron manifold and a 10 inch pipe will weigh very much more
than a Spintech muffler and it's associated headers and pipe?  Bolting it on
tonight.   Paul Conner

 
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