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Sound test for AB 1824 exhaust law in CA

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Old Jan 19, 2019 | 09:02 PM
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2012 C63 AMG - 2006 Mitsubishi Evo IX - 1979 Jeep CJ7
Sound test for AB 1824 exhaust law in CA
Got my car tested today to see where it stands with California’s new exhaust law AB 1824. Tested at idle, 2500rpm & 5200 rpm. Car passed on idle, but failed the 2500 & 5200rpm test.

The car should not exceed 95dB in order to pass.

We scored a 108dB stock headers with secondary cat delete and resonator delete.

Any guess on what it would be when I install my lth’s?

Video:
https://m.youtube.com/watch?v=fN6D5KuXlZY

Last edited by c63_alex; Jan 19, 2019 at 09:26 PM.
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Old Jan 19, 2019 | 09:53 PM
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You will fail. LTH with resonator and cat delete approaches NASCAR/DTM/V8 Supercar at full throttles.
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Old Jan 19, 2019 | 10:20 PM
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2012 C63 AMG - 2006 Mitsubishi Evo IX - 1979 Jeep CJ7
Originally Posted by G_Money
You will fail. LTH with resonator and cat delete approaches NASCAR/DTM/V8 Supercar at full throttles.
I know it would fail, I’m curious if anybody with long tubes has done a decibel test and what numbers they got
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Old Jan 19, 2019 | 10:53 PM
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Originally Posted by c63_alex


I know it would fail, I’m curious if anybody with long tubes has done a decibel test and what numbers they got
Why does it matter? You'll fail either way.
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Old Jan 19, 2019 | 10:56 PM
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Full IPE exhaust is 170+ dB. So with headers and stock cat back. I’d say 140-150’s db lol
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Old Jan 19, 2019 | 10:59 PM
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2012 C63 AMG - 2006 Mitsubishi Evo IX - 1979 Jeep CJ7
Originally Posted by PeterA90
Full IPE exhaust is 170+ dB. So with headers and stock cat back. I’d say 140-150’s db lol
interesting, thanks for the info!
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Old Jan 19, 2019 | 11:04 PM
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I have mbh headers full 🐱🤫 with xpipe which should quiet it down and my shop did a dB reading and it was pegged passed their dB measurement device of 135. Honestly could be the loudest street car with a muffler. The akra mufflers tremendously quiet the car down if you need to pass. With secondary delete. You’ll need to put the res back on. You’ll never pass with longtubes.
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Old Jan 19, 2019 | 11:49 PM
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2012 C63 AMG - 2006 Mitsubishi Evo IX - 1979 Jeep CJ7
Originally Posted by PeterA90
I have mbh headers full 🐱🤫 with xpipe which should quiet it down and my shop did a dB reading and it was pegged passed their dB measurement device of 135. Honestly could be the loudest street car with a muffler. The akra mufflers tremendously quiet the car down if you need to pass. With secondary delete. You’ll need to put the res back on. You’ll never pass with longtubes.
Sounds like a monster. Yeah my intentions aren’t to pass really. My long tubes are still going on in a month or so. I only drive the C63 once a week on Sundays, the rest of the week I’m in my 0dB Tesla 😂
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Old Jan 20, 2019 | 12:46 AM
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What happens when you don’t pass?
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Old Jan 20, 2019 | 01:22 AM
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Originally Posted by PeterA90
What happens when you don’t pass?
A ticket and a $1000 fine!
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Old Jan 20, 2019 | 01:23 AM
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Originally Posted by G_Money
A ticket and a $1000 fine!
total scam lol
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Old Jan 20, 2019 | 02:18 AM
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Originally Posted by PeterA90


total scam lol
Well you gotta pay for infinite amounts of illegal immigrants somehow
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Old Jan 20, 2019 | 10:34 AM
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What a crock! So every Biker in Cali running a Harley is going to get pulled and fined $1,000? Good luck with that.
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Old Jan 20, 2019 | 11:58 AM
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I wonder how this would do with the people with Valvetronic exhaust with the flaps closed...
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Old Jan 20, 2019 | 12:21 PM
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Originally Posted by G_Money
A ticket and a $1000 fine!
that’s not entirely true. The suggested base fine is $25 with a total fee of $193

https://www.sema.org/sema-enews/2019...aust-noise-law
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Old Jan 20, 2019 | 01:15 PM
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Originally Posted by Bonesxxx
What a crock! So every Biker in Cali running a Harley is going to get pulled and fined $1,000? Good luck with that.
Motorcycles are exempt from this rule. They carved our an exclusion for motorcycles and vehicles over 6000 pounds.
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Old Jan 20, 2019 | 05:27 PM
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Originally Posted by I am Jeff
Motorcycles are exempt from this rule. They carved our an exclusion for motorcycles and vehicles over 6000 pounds.
there you go. Just get a GL 63 and straight pipe it lmao
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Old Jan 20, 2019 | 09:27 PM
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Originally Posted by chrisridebike8


that’s not entirely true. The suggested base fine is $25 with a total fee of $193

https://www.sema.org/sema-enews/2019...aust-noise-law

That's what it used to be, along with fix it ticket, but now it's $1000 pretty sure...

Instagram has been going crazy about it. You could get cutouts to close by the cops but still sucks.
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