03-13-2024, 04:10 PM | #1 |
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My California Smog Test Experience With A Modded Vehicle
I thought I'd share my experience smogging my modified car in Los Angeles, CA. I hope that some users on this forum will find this thread useful.
I purchased my car completely stock in early 2021 and quickly began modding it since I didn't have to worry about a smog check until 2024. Mods: MST intake AWE cat-back exhaust CG Precision DS-1 hi-flow race catted downpipe bootmod3 stage 2 tune x-hp stage 2 transmission tune I don't run the car on any E85 blends - just an OTS Stage 2 map w/ 91 ACN fuel. I flashed the car back to stock and re-locked the DME via bootmod3. I drove it for approximately 60 miles and went straight to a smog place that I called ahead of time to see if they performed 'pre-tests'. Pre-tests, for anyone that doesn't know, is when the smog tech tests the car without the results being sent to the DMV. In this case, he hooked up an OBD scanner/tool to the car and scanned everything to see if all the systems were ready or not. I passed the pre-test and decided to proceed with the official test. I was pretty nervous because here in CA if you fail the smog check you can be referred to the state referee which isn't fun. Anyways, I passed. He did ask me if I had any aftermarket parts on the car and I said no. I did not witness the tech go around my car with a mirror to look under the vehicle which was a relief - I assume my reply to his question was sufficient for him. I hope this helps someone out |
03-14-2024, 09:04 PM | #2 |
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looks about right , pass with high flow cat , exhaust , and intake. Cat less will not pass/if they inspect for carb etc
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2018 340i - MHD CUSTOM TUNE, PURE850, DORCH STG2.5,MHD-FLEX-FUEL, M-PERF LSD, XHP Stg 2, CSF Heat Exchanger, M-Perf EXHAUST Mid Pipe BACK, Ross Racing Oil Catch Can, Evo Race Work Downpipe, PURE Inlet, DINAN Intake, VRSF Chargepipe
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03-15-2024, 02:29 AM | #3 |
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I usually find a place to slip $150 and they make it pass. Only thing is last friend I sent to my spot, where I paid $150 3 years ago, charged him over $300. With the whole smog abatement thing my 8 years is up next year. Thank you for the post 🙏 I’m catless though so screwed.
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03-18-2024, 06:16 PM | #4 |
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03-18-2024, 10:18 PM | #5 |
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03-19-2024, 09:56 AM | #6 |
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03-19-2024, 10:46 AM | #7 |
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Catless passes for me no issues with spacer. Flashed back to stock tune, no locking DME. Pre-test done myself until all green and go to shop. No issues.
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03-20-2024, 07:48 PM | #8 | |
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03-21-2024, 12:44 AM | #9 |
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Really? I’m in California and curious if that would work for me as well. Do different states allow for different levels of emmisions? What draws the lines? I know some states just don’t give a F, like texas, and can problem drive a nascar if it had lights and blinkers
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03-21-2024, 06:38 AM | #10 | |
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03-21-2024, 04:01 PM | #11 | |
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I think most states are similar but CA is more strict |
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