A test program was conducted to evaluate the Echlin emission control system. The system consisted of: (1) an ultrasonic generator; (2) a carburetor spacer plate; (3) tubing, which connects the generator to the carburetor spacer plate; (4) gaskets necessary for carburetor removal and replacement. In addition, Echlin recommended that the spark timing be retarded to 2 deg BTDC, the idle CO be set to 2% and the vacuum advance line be disconnected and plugged. The test vehicle was a 1963 Ford Galaxie powered by a 289 CID engine with a two-barrel carburetor, and automatic transmission. The 1975 Federal Test Procedure was used to determine exhaust emission levels. Test results and conclusions are discussed in detail.