1
What is?
is the exhaust gas of the engine through an exhaust manifold and an exhaust manifold is directly discharged into the atmosphere, without passing through the three-way catalytic converter and the muffler, or reducing the original number of the muffler.
2
Function
Since the exhaust line without catalytic converters and mufflers , so that the exhaust gas is very smooth, but the noise also increases. If the engine at high rotational speed region, increases smoothly exhaust the exhaust efficiency, thereby improving the power performance of the engine at high rpm. But the engine at low rotation region, the exhaust gas is too smooth, that is, back pressure is too low, resulting in low-speed torque loss of the engine, resulting in decreased engine power.
