08-26-2009, 03:03 AM
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CC Member
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Join Date: Mar 2006
Location: San Marcos california,
CA
Cobra Make, Engine: 1989 KCC from South Africa Right Hand Drive
Posts: 1,605
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Not Ranked
Primary tubes and length make a difference to the backpressure and hence the power and sound. The collector kind of creates a ventury to speed things up and accelerate the gases. A petrol/gas engine needs to scavenge the exhaust gases as completely and quickly as possible........no backpressure being best in a 4 stroke.
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