You can use a catback exhaust to work on the appearance. They can put the fwd on the dyno, if your afc settings are "good" then even on the 15 and 25 mph test it should pass right? Below are some frequently asked questions about California exhaust noise laws! In Texas you probably still only do a 2 speed idle. Since most high quality systems, at least those systems that are 50 state legal, are installed behind the catalytic converters, there shouldnt be any warranty concerns to other components. AffiliateBanner += ''; We'll send you the most interesting Street Muscle articles, news, car features, and videos every week. It is against federal law to remove the secondary cats, so any state inspection regardless of being part of CARB should fail. The emission from your exhaust line is not processed by your muffler. Whats louder muffler delete or straight pipe? The purpose of the Flowmaster is completely lost if you leave the muffler on. However, you may visit "Cookie Settings" to provide a controlled consent. is coming from. There are cat-back exhaust systems that do not include a muffler. Taking a lot of short trips is the worst thing you can do for your air quality. The majority of the hFC's are legal in 49 states. Do you need a muffler to pass smog in California? Its a catback exhaust, so it shouldnt affect emissions. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. Roy, Cali can be a PITA for anything emissions related. Can you pass smog with aftermarket exhaust? The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". You will fail if you do anything like downpipes, midpipes, and the like. Smog inspections or "smogging" a car in California is fairly simple: you pay someone in some back-alley garage around $75 to plug the state mothership into your OBD2 port and sniff around for emissions-related check engine codes. The purpose of a smog check is to make sure that the cars on the road are running cleanly. The exhaust systems of vehicles have to have mufflers. 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. This cat-back exhaust system will run you $1,379.99 if purchased from CJ Pony Parts. var exit_url = ''; Ford 302 Ignition Timing Specs: Revealed Secrets! As mentioned, it has to be CARB labeled or it's a violation, not just smog, but also by the CHP's on a roadside check. document.write(AffiliateBanner);