The variable back pressure design adjusts the back pressure according to the speed, and there is no resonance sound at high speeds. When the engine is running at low speed, the gas flow rate will slow down, the speed through the regulating valve will slow down, the vacuum suction will be small, and the stored exhaust gas back pressure per unit time will be large. When the engine is running at high speed, the gas flow rate is fast, and the speed through the regulating valve is fast. The vacuum is large, and there is a lot of exhaust gas, resulting in smooth high-speed exhaust. Achieve the effect of increasing torque and horsepower. (Full speed power) The high speed is about 85 decibels, which is currently the exhaust pipe that demonstrates significant power improvement based on foreign design concepts in China. The sound came out at 2500-3000 rpm and quieted down again at 4000 rpm.
