exhaust chamber kit

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Built-in chamber. A middle pipe that enhances the "suction effect".

■Exhaust system tuning is not just about reducing resistance.
When tuning the exhaust system, if you only want to reduce exhaust resistance, the best performance will be achieved by increasing the diameter of the muffler or directing the exhaust from the exhaust port. However, if you exhaust the air directly from the exhaust port, performance will drop. This is because, if the piston only pushes out exhaust gas during the exhaust stroke, the exhaust gas in the combustion chamber will not be completely exhausted, and the combustion chamber will not be able to be filled with air-fuel mixture during the next intake stroke. In other words, the engine's performance cannot be fully demonstrated.

■The key to increasing output lies in the negative pressure wave = "sucking out" power.
In order to efficiently discharge exhaust gas from the combustion chamber, the key is not only to push it out with the piston, but also to actively "suck it out."
Exhaust gas flows in the order of exhaust manifold (for turbo cars, turbine → front pipe) → middle pipe → muffler, and the ``negative pressure wave'' generated in this process becomes the source of the force sucked out.
"Negative pressure wave" is the pressure generated by the volume change when exhaust gas reaches a point where the volume expands, such as an expansion pipe, and moves in the opposite direction from the muffler outlet. When the "negative pressure wave" reaches the exhaust port, it loses its destination and reverses toward the muffler exit, becoming a "negative pressure inversion wave." This "negative pressure reversal wave" becomes the "sucking force" and sucks out the gas remaining in the combustion chamber. As a result, more air-fuel mixture is filled into the combustion chamber during the next intake stroke, increasing output.

■Built-in chamber. A middle pipe that enhances the suction effect.
Our "Exhaust Chamber Kit" increases the suction effect by installing a chamber (expansion pipe) in the middle of the middle pipe. The key to setting is the layout of the chamber, which is the point where negative pressure waves are generated. This is because the effective rotation range changes depending on the distance from the exhaust port to the chamber, and the output characteristics change. In other words, depending on where the chamber is installed, there will be differences in characteristics such as high rotation type or low rotation type. Needless to say, our aim is the street best. The layout aims to improve accelerator response in the commonly used range. Furthermore, the chamber diameter will also be carefully considered to improve exhaust efficiency. By the way, since mass-produced products such as catalytic converters are used, there is no increase in exhaust volume. Although it is possible to install the part alone, we recommend using it in conjunction with an AutoExe muffler.