emissions regulations
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Teching In
Joined: Aug 2008
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emissions regulations my car is currently registered pno since i have lt headers and no cats on it. i was wondering if i put cats on it, is there any way to have it legal while not having to remove my tsp true duals? If anyone can direct me to an official source that could give me details on the emissions regulations for aftermarket parts, that would help the most. Thanks for your time. Also, I'm pretty sure lt headers are illegal no matter what but can anyone confirm this?
TDs are fine, as long as they are under the dB level for exhaust.
You got your answer for LTs (above).
To make it legal, replace the LTs with stock exhaust manifolds (or CARB-approved shorty/mid headers) with OEM cats.
You got your answer for LTs (above).
To make it legal, replace the LTs with stock exhaust manifolds (or CARB-approved shorty/mid headers) with OEM cats.
I would be hesitant to chop the y-pipe right after the cats for a true dual system. Yes it's still "cat-back", but I feel like the smog tech would give you some grief. Maybe I'm wrong though.
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Refer to cali noise regulations and you will see that the DB of a stock z28 is higher in both cruise and idle than is allowed by basic CA noise regulations. Unless its changed in the last 4 years. The car is in violation in stock form, so yes- any modification to exhaust that increases the volume would be illegal.
That said, they don't generally meter the DB level, its subjective to the REF at the station where you get checked. Ive been written and seen many cars written for violations by a peace officer, and with no change pass at the ref stations. GL -
Move outta California.
That said, they don't generally meter the DB level, its subjective to the REF at the station where you get checked. Ive been written and seen many cars written for violations by a peace officer, and with no change pass at the ref stations. GL -
Move outta California.
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Verdad Gallardo Thread Starter
Teching In
Joined: Aug 2008
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moving out is the plan, it's just gonna take a couple of years.
Refer to cali noise regulations and you will see that the DB of a stock z28 is higher in both cruise and idle than is allowed by basic CA noise regulations. Unless its changed in the last 4 years. The car is in violation in stock form, so yes- any modification to exhaust that increases the volume would be illegal.
That said, they don't generally meter the DB level, its subjective to the REF at the station where you get checked. Ive been written and seen many cars written for violations by a peace officer, and with no change pass at the ref stations. GL -
Move outta California.
That said, they don't generally meter the DB level, its subjective to the REF at the station where you get checked. Ive been written and seen many cars written for violations by a peace officer, and with no change pass at the ref stations. GL -
Move outta California.
Thread Starter
Teching In
Joined: Aug 2008
Posts: 36
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I talked to a smog tech recently and he said "as long as everything from the cats forward has to be either stock or smog approved. Anything past that isn't looked at for passing smog."
