Can a Valve Exhaust System Pass the Annual Inspection?

2 Answers
ElizabethLee
07/29/25 6:24pm
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.
Was this review help?
13
0
Share
MacAustin
08/14/25 11:13am
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.
Was this review help?
8
3
Share
Expand All
More Forum Discussions

Can I still drive on the highway without an ETC?

You can still drive on the highway without an ETC by obtaining a toll card at the entrance toll station and stopping to pay the toll at the exit toll station. ETC is a fully automatic electronic toll collection system and one of the service functions of intelligent transportation systems, particularly suitable for use on highways or in busy bridge and tunnel environments. Currently, highway toll stations have dedicated ETC lanes. Vehicle owners only need to install a sensor card on the windshield and preload funds. When passing through the toll station, there is no need for manual payment or stopping—the highway toll will be automatically deducted from the card, enabling automatic toll collection. This system processes each vehicle in less than two seconds, with a lane capacity 5 to 10 times that of manual toll lanes.
18
0
Share

What causes shaking and vibration when stepping on the car brakes?

Reasons for shaking and vibration when stepping on the car brakes: 1. Problems with the brake pads and brake discs; 2. Severe unilateral wear of the brake disc; 3. Poor return of the brake pump. Compared to brake pads, brake discs wear out more slowly, and repair shops generally recommend replacing brake pads and brake fluid. After a certain period of use, brake discs may wear out, leading to uneven surfaces or thickness that does not meet standards, which can severely affect braking performance over time. Braking, also known as deceleration, refers to the action of stopping or reducing the speed of running locomotives, vehicles, and other transportation tools or machinery. The general principle of braking involves fixing a wheel or disc on the high-speed shaft of the machine and installing corresponding brake shoes, bands, or discs on the machine base to generate braking torque under external force.
14
0
Share

Where is the spare tire of the Encore placed?

The spare tire of the Encore is placed under the trunk panel. To install it, place the spare tire under the trunk panel and secure it with screws. Here are some important notes regarding the spare tire: 1. Regularly inspect the spare tire. The inspection mainly involves checking the tire pressure and looking for any wear or cracks. Replace the tire as soon as possible if the tread wears down to the wear indicator line. 2. Avoid placing oil products near the tire. The main component of tires is rubber, which is highly susceptible to damage from oil products. If the tire comes into contact with oil, it may swell and corrode, significantly reducing its lifespan. 3. Replace the spare tire periodically. Since tires are made of rubber, they can age over time. The typical aging period for tires is about 4 years, so the spare tire should be replaced after this period.
13
2
Share

What is the wheelbase length of the Volkswagen Lavida?

The wheelbase length of the Volkswagen Lavida is 2688 mm. Relevant information about the Volkswagen Lavida is as follows: 1. The Volkswagen Lavida is a compact sedan with a length, width, and height of 4670 mm, 1806 mm, and 1474 mm respectively. 2. The new Lavida uses three engines in total: a 1.2-liter turbocharged engine, a 1.4-liter turbocharged engine, and a 1.5-liter naturally aspirated engine. 3. The Lavida's in-car navigation system combines touch screen and knob control operation, and has MP3 playback capability, supporting USB, AUX, and SD card expansion slots. It is easy to use and powerful, with a foldable LCD screen design. 4. The Volkswagen Lavida is front-wheel drive, with a front suspension type of MacPherson independent suspension and a rear suspension type of torsion beam semi-independent suspension.
17
5
Share

What car series does the Accent belong to?

The Accent is a model produced by Beijing Hyundai. Here are some relevant introductions about the Accent: 1. In terms of appearance, the Accent integrates the essence of both Eastern and Western car series. While maintaining Hyundai's consistent refinement and roundedness, its smooth body lines and spacious interior reveal the dynamic vitality of European cars. 2. For the interior, the Accent pursues harmony between external fashion and dynamism, achieving a balance between practicality and style. The choice of materials, colors, and textures in the Accent's interior is very meticulous, showcasing a distinct contemporary feel. The highly integrated design of the center console not only creates a more spacious interior for passengers but also highlights a distinct sporty style through various color combinations, complementing the smooth and dynamic exterior. 3. The Accent sedan boasts qualities such as high power, high comfort, high safety, low fuel consumption, low emissions, as well as an attractive appearance and excellent craftsmanship.
17
2
Share

Where is the AUX port located in the Cadillac XT143?

Cadillac XT143's AUX port is located under the center armrest. Here is some information about Cadillac: 1. Cadillac is a luxury automobile brand under General Motors in the United States, and it has become synonymous with high quality and luxury in North America. 2. Over the past century, Cadillac has pioneered numerous firsts in the automotive industry, establishing many luxury car standards. It has been honored with the title "World Standard" by the prestigious London Royal Automobile Club, known for its pursuit of ultimate prestige. 3. Cadillac combines a century of historical excellence and the wisdom of generations of designers, making it a leading brand in the automotive industry.
17
1
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.