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Message: <blockquote data-quote="SVTurbo 98" data-source="post: 852031" data-attributes="member: 11761">Well you didn't really prove anything with that response but rather repeat what you've read on the web or read in a magazine. I was looking for tests that you have done (or someone else) that prove too big of an exhaust after the collector will hurt performance with tuning involved. How exactly is velocity measured in an exhaust system?What happens to exhaust gases as they cool down?Where in the exhaust system do the gases cool down and is it farther down the system as you increase rpm?Where is the pulse based exhaust scavenging concentrated at?I'm really not trying to be an ass i'm just looking for hard facts that support your claim...</blockquote>