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02-13-2015, 11:45 AM | #1 |
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Anyone pass Colorado emissions on n54 w/catless downpipes?
as the title asks, im hoping to actually speak to someone who has passed emissions legally. There seems to be conflicting information and before i spend the money i was hoping for proof.
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02-13-2015, 02:56 PM | #2 |
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The only way you can pass legally is have the stock catted DP.
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02-16-2015, 10:18 PM | #3 |
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Colorado recently changed their emissions law. Cars from 2008 or 2009 and newer are exempt emissions for 7 years. And older cars past those years only have to do the OBD test and no treadmill test too. Make sure no codes our check engine lights present. That's from what I read on colorado gov website.
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02-17-2015, 08:43 AM | #4 |
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Mine passed
My 08 passed in 2013 with AR catless downpipes and stock exhaust before installation of full Berk DP back.
HC GPM 0.3705 Limit is 1.20 CO GPM 3.2446 Limit is 15.0 CO2 GPM 352.1866 No limit stated NOx GPM 0.1848 Limit is 1.50 Dirtier than stock for sure, but passed easily.
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02-17-2015, 08:47 AM | #5 |
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Emissions law in Co
Colorado recently changed their emissions law. Cars from 2008 or 2009 and newer are exempt emissions for 7 years. And older cars past those years only have to do the OBD test and no treadmill test too. Make sure no codes our check engine lights present. That's from what I read on colorado gov website.
I read this on the gov website too. Looks like you're ok until next year.
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2008 135i- Sparkling Graphite-Steptronic
ESS Stage 3 Flash-BMS Dual Cones-Helix Intercooler-AR Design Catless Downpipe-Berk DP Back Full Street Exhaust-AR Design Oil Cooler-AR Design Catch Can-OS Giken LSD-Bilstein B12 Kit-Whiteline rear sub-frame bushing inserts. 225-255 Direzza Z2. |
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02-19-2015, 10:21 AM | #7 |
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Colo Emissions
Looks like OBD check annually. See below.
Vehicles that are eight (8) through eleven (11) years old will need their "On-Board Diagnostic (OBD)" computer systems checked. If the “Check Engine” light is turned on, then these vehicles will fail the inspection and need repairs. Starting in 2015, this will apply to vehicles from model years 2005 through 2008.
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2008 135i- Sparkling Graphite-Steptronic
ESS Stage 3 Flash-BMS Dual Cones-Helix Intercooler-AR Design Catless Downpipe-Berk DP Back Full Street Exhaust-AR Design Oil Cooler-AR Design Catch Can-OS Giken LSD-Bilstein B12 Kit-Whiteline rear sub-frame bushing inserts. 225-255 Direzza Z2. |
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02-19-2015, 10:58 AM | #8 |
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One way around the "treadmill test" is to tell the inspector you have a bad trans/syncro. They will do the test without the dyno/treadmill.
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05-12-2015, 04:10 PM | #9 |
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Just Passed Mine, OBX DP's, secondary's still in place, running E85, JB4 Set to Map 5. It didn't fastpass through the OBD so they put it on the rollers and she passed.
They gave me the runaround about aftermarket wheels though the one on Peoria no longer does the damage waiver.
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09-21-2020, 03:03 PM | #10 |
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Sorry to resurrect an ancient thread. I am also in Colorado and am looking for a way to pass emissions without having to reinstall stock DPs and then remove them again.
Has anyone heard of anyone moving the O2 sensors to behind the secondary cats? I understand it may take longer for them to warm up this way, but wouldn't you eventually achieve readiness? |
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10-13-2020, 01:49 PM | #11 |
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I passed with AR Catless downpipes and the stock catted midpipe.
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10-17-2020, 12:23 AM | #13 |
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I did drive it hard before the test. All I know is that it passed, and they did put it on the rollers.
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-2010 BMW 135i - Titanium Silver - Procede v3/ETS 5" IC/AR Catless DP>N54mid>Berk Race/BMS OCC/VRSF Turbo Inlets & CP/SP rotors/Pagid RS29/APEX ARC8/Ohlins DFV/M3 Full Suspension and Bushings/Wavetrac LSD // 395rwhp/469rwtq on 91oct
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