Can a Valve Exhaust System Pass the Annual Inspection?
2 Answers
Whether a modified valve exhaust system can pass the annual inspection depends on the specific circumstances. If the modification does not alter the vehicle's parameters, it can pass the inspection; however, if it changes the vehicle's parameters, it will not pass. Modifications such as altering the intake and exhaust systems, widening the body, lowering the chassis, changing braking components, or blindly upgrading high-beam headlights, which affect the vehicle's technical parameters, will fail the annual inspection. Annual Inspection Considerations: During the annual inspection, the vehicle management office will check the vehicle's lighting. If the vehicle's lights are found to be too dim or too bright, it will be deemed unqualified and will not pass the inspection. If the lights are too dim, check the wiring and bulbs for aging and replace the necessary components if required. If xenon headlights have been installed, it is recommended to revert to the original headlights before the inspection to ensure compliance.
Valve exhaust systems can usually pass annual inspections, but it depends on the setup and environment. I've used it on modified cars, and you must ensure it's switched to silent mode before the inspection because noise testing is a critical point. In terms of emissions, factory valve exhaust designs meet standards, so there's usually no issue; but aftermarket systems without certification may fail if noise exceeds limits. I recommend closing the valves on inspection day and checking local regulations. Some areas have strict noise limits, and exceeding 80 decibels can be risky—it's best to get a pre-check at a 4S shop. Regular system maintenance is also important to avoid rust or leaks affecting performance.