I was thinking that a 5" pipe surrounding the perforated pipe would quiet the exhaust note and would also serve as an augmentor tube to pull air through the engine compartment and the plenum that I will build around the exhaust headers to keep reflected heat and ambient heat out of the engine compartment. I've got a pretty good idea how I want to configure my cooling and exhaust setup, but don't have a scanner to be able to post this stuff on the internet.
Brian Trubee
Redmond, Wa

You could mail it to me Brian. I'll send my address.

Paul Lamar
 
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