改大排气——降低了排气回压，低扭会下降，发动机排气门将会由于超高温度简单焚毁。

1 large exhaust — reduced exhaust back pressure, low torque will decline, engine exhaust will due to ultra high temperature burning simple.

youdao

改大排气——降低了排气回压，低扭会下降，发动机排气门将会由于超高温度简单焚毁。

1 large exhaust — reduced exhaust back pressure, low torque will decline, engine exhaust will due to ultra high temperature burning simple.

youdao