Quote:
Originally Posted by big_G
From my readings in the past, articles written my much smarter people than I, have said that all exhaust tuning is done with the primary tubes in the header and the collector length. Any restriction past the collector is costing horsepower and torque. This tells me that only the headers are responsible for any scavenging effect the exhaust system contributes to power gains.
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I believe this to be true. However, on a forced induction engine, Zoomies baby.
