This standard specifies the performance test methods for automobile exhaust mufflers. This standard applies to exhaust mufflers for Class M and Class N motor vehicles.
QC/T 630-1999 history
2009QC/T 631-2009 Automotive exhaust muffler assembly technical specification and test methods
1999QC/T 630-1999 Performance test method of automobile exhaust muffler
QC/T 630-1999 Performance test method of automobile exhaust muffler was changed to QC/T 631-2009 Automotive exhaust muffler assembly technical specification and test methods.