Quick Answer: Why Are Headers Illegal In California?

Why is K&N illegal in California?

Air Resources Board investigators discovered that K&N Engineering, based in Riverside, Calif., sold performance parts that had not received exemptions from California’s emissions control system anti-tampering laws.

California law prohibits the advertising, sales or installation of parts that modify vehicle emissions ….

What is better long tube vs shorty headers?

For shorty headers, the port pipes actually merge into a single exhaust pipe in a much shorter distance. For long tube headers, the exhaust pipes are much longer and merge farther out. Because of this, each design impacts back pressure in the exhaust system in a different way.

Will a cat back exhaust pass smog?

Answer: No problem installing a cat back exhaust system. The smog inspection does not inspect the muffler or exhaust system after the CAT. … A vehicle will not pass the smog check without having the correct catalytic converter installed.

No it’s still illegal. I’m not legal with a MBRP catted DP. You will pass a portable sniffer test but if they want to be a douche they can still send you to make sure. The smell is what gives it away.

Is Twin Turbo illegal in California?

“OEM and even aftermarket turbo systems are now able to comply with CARB’s emissions regulations, while still producing awesome power and making cars fun to drive. …

Does a 30 year old car need smog in California?

Under the current law, cars 30 years or older are exempt from smog testing. … It does not change the status of any currently exempt vehicle. What’s more, cars newer than 1976 are already passing their smog tests and the emission rules for these vehicles will be frozen in time.

Can straight pipes hurt your engine?

… a race car style exhaust system is a bad upgrade for a street vehicle. … A straight pipe, for example, can cause exhaust gas velocity to increase. This will likely reduce engine performance below 2,000 or 2,500 RPM, making your vehicle a little slower to launch from a stoplight.

Can you pass smog with a Catless downpipe?

If there is anyone that passed smog with catless downpipes, please share. No your car isn’t going to pass smog without downpipes UNLESS you find some kids to pass you =( No your car isn’t going to pass smog without downpipes UNLESS you find some kids to pass you =(

What You Must Have: Engine performance upgrade components such as upgrade ECU, turbo units, exhaust headers, intake manifolds, and other emissions related components can pose smog check problems, however if proof is shown that the upgrade units are legal for use in California (they posses an EO number) or they are OEM …

Why are long tube headers illegal in California?

“Legally” there are NO long tube headers that are smog legal in CA. The reason is, the cats have to be in the stock location, and obviously that isn’t possible with a long tube header. You can have legal shorty headers because the headers stop before the cat, and the cat remains in the stock location.

Are shorty headers worth it?

If you’re driving a turboboosted engine, you will absolutely want shorty headers, but they’re also great for a variety of other drivers. If you’re looking to increase the performance of a vehicle that’s primarily your daily driver or commuter, shorty headers are a good idea.

Can you modify cars in California?

California has one of the stricter car modification laws in America, and among the mods that are illegal in the state include underbody neon lights license, extra loud exhausts, radar detectors / laser jammers, license plate covers and frames that obstruct any part of the plate’s numbers, letters, or the state name.

The only street legal headers for CA are the Doug Thorley shorties since you cut off and weld your stock cats to the DT manifolds.

Exhaust modifications are illegal only if noise emitted is over 95 decibels. Keep in mind California smog laws or other legislation may still make your custom exhaust modifications illegal. All vehicle exhaust systems must have mufflers. Any bypass, cutouts, and especially whistle tips are not permitted.

The sale and installation of an aftermarket exhaust system remains legal in California so long as it does not exceed a sound level of 95-decibels when tested under SAE J1492 and complies with all other exhaust and safety laws and regulations.