Thanks Greg for the nice information regarding header length to
advantages.

Do you have a recommendation for someone looking for a quiet muffler and
header setup.  It seems that everyone posts the noise level increases
with whatever they do.

My main concern is increasing power in the 3100 -3400 RPM range, this is
where the Automatic's stall convertor hooks up, and speed is above 48
mph, where aerodynamic force becomes effective. This in my opinion is
the flat spot in my 91's power range.

Also the stock vanagon system, except your comments, seems to be of a
header type construction?

Sincerely,

Mark Keller
91 Carat, and watching the exhaust system near it's end of natural life