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Chances are, Black Sabbath will be playing in the background. You should know do to proceed or what will you need to do to complete the smog inspection . California smog laws can still make your custom exhaust modifications illegal. From the criminal penalties for illegally modifying a vehicle to the repercussions for those found with illegal modifications, we'll cover it all in order to provide a better understanding of this complex issue. Performance upgrade components bought online or out-of-state might require a little bit of leg work to ensure they will not cause a California smog check failure. Although statewide laws govern the test, there is no set test protocol. Stay fast. Both of the exhaust systems components are thought to be the same object. It may not display this or other websites correctly. The inspectors will immediately notice if your muffler is missing or if there is a large drilling hole in the muffler, making the car sing louder. As stated, the mufflers primary goal is to minimize excessive noise. The sound level limit for vehicle exhausts in California is 95 decibels. Take your truck down a gravel road to make a nice uniform coating of dust in the engine bay to act as camouflage. It loses efficiency over time and may stop working, leading to a failed emissions test, clarifying the answer to can you pass smog without muffler?. (a) No person shall modify the exhaust system of a motor vehicle in a manner which will amplify or increase the noise emitted by the motor of the vehicle so that the vehicle is not in compliance with the provisions of Section 27150 or exceeds the noise limits established for the type of vehicle in Article 2.5 (commencing with Section 27200). DSMtuners is the largest DSM forum and online enthusiast community on the web. California Smog With A Turbo - Car Forums and Automotive Chat Analytical cookies are used to understand how visitors interact with the website. The third thing you can do is to try and repeal this law. This cookie is set by GDPR Cookie Consent plugin. Will an aftermarket exhaust pass smog in California? Fines for illegal exhaust can be very high. Fortunately, it has become much easier than manually removing exhaust caps. . . It is not possible to say yes. They are all going to be very loud. The manufacturing plant where your car was first produced conducts similar checks. Can you pass smog with aftermarket catalytic converter? In case the Referee Center determines your vehicles exhaust noise is not over the legal limit, the court can dismiss your citation. can you pass smog with aftermarket exhaust in california? It only serves to dampen engine noise. Is doing a muffler and resonator delete on my car legal in California Modern cars ECUs and exhaust sensors will go berserk if the muffler is cut off or deleted. Help to pass CA smog/need cat? | Dodge Cummins Diesel Forum { On the other hand, if you purchase a MagnaFlow Street Series Cat-Back Performance Exhaust System directly from MagnaFlow, you can expect to pay around $850 excluding labor.