Cyclone is also effective at exhaust pipe.
Exhaust gas goes out through the exhaust pipe getting resistance from the wall of the pipes, as intake air.
When installed cyclone's fuction is strong enough,
it changes normal gas flow pattern gathered center with faster speed to reduce exhaust gas pressure in combustion chamber and increase amount of the intake air make adding power and eliminating noise,actually.
So we recommend to install the CYCLONE not only at the initial place
(after flow sensor) but also at the exhaust junction line.