Quote:
Originally Posted by Thumper
An expansion chamber can be found on 2stroke engines. It might be a catalytic converter
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They also run expansion chambers on 4-Strokes, they are different than the 2-Stroke one, but the bigger section on the header is an expansion chamber, all the performance 4-Stokes systems have them, and the Templar has one on the stock system.... It smooths out the pulses, allowing the exhaust to flow smoother