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There is a reverse pulse in the exhaust when the exhaust valve closes. They make headers with a anti-reversion cones. The cones are located near the exhaust port. 2 stroke
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12-04-2018, 07:41 AM
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Ronin Samurai - Assassin
 
Join Date: Dec 2011
Location: Fayettenam,Pennsyltucky
Age: 69
Posts: 35,514
Drives: 2011 Nismo GM 6M
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There is a reverse pulse in the exhaust when the exhaust valve closes. They make headers with a anti-reversion cones. The cones are located near the exhaust port. 2 stroke engines with expansion chambers like on a dirt bike take advantage of this pulse to increase power.
https://crateinsider.com/using-anti-...te-free-power/
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