Exhaust manifold flow testing machines for detection of specific flow exhaust manifold, exhaust manifold for Channel 4's exhaust emissions testing. Through the use of "COSMO" DF-2810 Detector big traffic and the LFM-10-flow exhaust pipe on the 4-channel testing them one by one; final "Advantech" industrial computer through the RS232 interface data acquisition parameters, processing and analysis , To determine the final passage of the exhaust manifold 4 emissions if qualified, storage and automatically detect parameters, equipment failure through the tri-color light and buzzer alarm prompted the operator.