function unload() { Unbeknownst to most California car owners, important changes to your biennial smog take effect this July that can affect if you pass or automatically fail. Here's How to Pass the California Smog Check - General Auto Repair etc. As an Amazon Associate I earn from qualifying purchases.Privacy Policy | Affiliate Disclosure. The website states the petition is, "To repeal section 4 of AB-1824. A cat deletion is a pipe that removes the catalyst from the exhaust system. This certificate must be presented in traffic court. the operation of any of these systems may be illegal and require a CAP exemption, or in some cases, a CAP waiver. California has the strictest emissions laws in the country and if you modify your car with anything other than an exhaust pipe, youll fail your smog test. . Instead, the Bill only makes it mandatory for police officers to issue immediate tickets to offenders. The purpose of a smog check is to make sure that the cars on the road are running cleanly. Now I have to get it smogged again, and it passed with flying colors EXCEPT the tech said he cant find a . The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". When your cars emissions are burned off, your tailpipes readings show a decrease in emissions. Will a Modded Exhaust Pass Smog in California? Modern cars ECUs and exhaust sensors will go berserk if the muffler is cut off or deleted. C.A. The perforations and insulating material convert some sound waves into kinetic energy and heat for the devices needs before leaving the system. Any cutouts, or even whistle tips, are not allowed. Is resonator delete illegal in California? Answer (1 of 3): The technical answer is yes. You might remove the muffler but manage the noise at legal levels but you're still not in the clear. The cars engine wastes energy through emissions. I got it smogged when I registered it and it passed with flying colors. Exhaust in California - Mustang6G At this point the Referee Center will conduct an exhaust noise test: If Referee Centers test determines your vehicle is still not within legal noise limits, you will be required to repair it before attempting another test. You also have the option to opt-out of these cookies. If you want to modify or take out factors like O2 sensors, Exhaust Gas Temperature sensors, or diagnostic difficulty codes, you cant do it for a longer period of time. A muffler delete won't boost emissions as a muffler has no pollution-against or smog-control features.