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Discussion Starter #1
For the first time since I installed my aftermarket 3" dp, I had to go to get my emissions tested. My dp has a high-flow cat so, I assumed I would have no problems. Not the case :facepalm:
I was reluctant to say my aftermarket dp was causing too high a reading of NOx (2.2ppm -- isn't supposed to be higher than 1.5ppm here in CO). I went to my local indy and they said they have had three people this year come in with aftermarket P2R downpipes that failed emissions. So, I installed an OEM dp and guess what? I passed emissions.
Is there a workaround for this?
I've heard about the O2 sensor extension, but I think that is just for tricking the ECU so there are no CELs. I don't have an extension and I don't have CELs.

TIA:thumbup:,
Aj
 

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My ~8 month old Phuz DP passed CA emissions without any issue. I didn't have a spacer at first but I did get one CEL after a months so I installed a spacer and haven't seen it since. I was smogged with the spacer installed. Smog tech didn't fail for visual inspection either.
 

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Any idea which CAT is on the Phuz DP? Magnaflow?
 

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For the first time since I installed my aftermarket 3" dp, I had to go to get my emissions tested. My dp has a high-flow cat so, I assumed I would have no problems. Not the case :facepalm:
I was reluctant to say my aftermarket dp was causing too high a reading of NOx (2.2ppm -- isn't supposed to be higher than 1.5ppm here in CO). I went to my local indy and they said they have had three people this year come in with aftermarket P2R downpipes that failed emissions. So, I installed an OEM dp and guess what? I passed emissions.
Is there a workaround for this?
I've heard about the O2 sensor extension, but I think that is just for tricking the ECU so there are no CELs. I don't have an extension and I don't have CELs.

TIA:thumbup:,
Aj

Here in GA they just check the ECU via the OBDII port to verify no codes are present, I have never had issues. I am guessing that they do exhaust pipe enema's in Co?
 

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Discussion Starter #6
It depends on the cat being used. My Phuz DP passed fine for two years, now I need a spacer to pass.
BodyMassage,
So you are saying your Phuz DP passed at some point and then after two years failed? You then put in a spacer and passed? Do you remember why you failed if that is the case? High NOx readings?

My ~8 month old Phuz DP passed CA emissions without any issue. I didn't have a spacer at first but I did get one CEL after a months so I installed a spacer and haven't seen it since. I was smogged with the spacer installed. Smog tech didn't fail for visual inspection either.
noeish,
Did you have the spacer installed when you passed emissions? It looks like we have pretty close to the same setup, except I can't tell what DP you're using. Your signature says you have a EST DP.

Aj
 

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Discussion Starter #7
Here in GA they just check the ECU via the OBDII port to verify no codes are present, I have never had issues. I am guessing that they do exhaust pipe enema's in Co?
Yes :)
CO is quite intensive. They do a visual inspection, Run the car on an AWD dyno to mimc real-life situations, check the ECU via OBDII for CELs AND test the fuel system for leaks as well as the gas cap!:(
 

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BodyMassage,
So you are saying your Phuz DP passed at some point and then after two years failed? You then put in a spacer and passed? Do you remember why you failed if that is the case? High NOx readings?
In MA, we don't do the tailpipe check anymore. They plug into the OBDII port and check there. If I don't have a code for an issue, I pass. So basically, coming up on last year, I had a CEL for the rear o2 sensor, so I tossed a spacer on it and got it inspected.
 

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In MA, we don't do the tailpipe check anymore. They plug into the OBDII port and check there. If I don't have a code for an issue, I pass. So basically, coming up on last year, I had a CEL for the rear o2 sensor, so I tossed a spacer on it and got it inspected.
+1 same in CT. I passed with my race s60r DP and I have no cel's without a spacer
 

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noeish,
Did you have the spacer installed when you passed emissions? It looks like we have pretty close to the same setup, except I can't tell what DP you're using. Your signature says you have a EST DP.
Yes, I had the spacer installed when I passed emissions... I'll see if I can dig up the old report and post it here.

Signature is correct. I just replaced my Phuz DP last weekend with a ceramic coated EST DP. My Phuz DP had a hole in the flex section (because I installed it poorly and it rubbed through). I plan to replace the flex section and either resell it since it's a pretty new pipe and cat. I need to do a smog with the EST DP + cat first though, to be sure it passes. If it doesn't, I plan to take the flanges off of the EST cat and move them to the Phuz cat since I know it will pass.

Also, since the place I smog at doesn't have an AWD dyno, they just do idle and 2500 RPM sniff test (along with making sure no CELs are set).
 

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Also in MA, cars that are older than 15 years old, apparently only need a safety check. My parent's 855R has had a CEL on for two years now and it passes everytime. Kind of stupid, but whatever.
 

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Any idea which CAT is on the Phuz DP? Magnaflow?
His website says "3 in. High-Flow Magnaflow (EPA & Carb Certified) Catalytic Converter" but doesn't specify the exact part number.
 

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Yes :)
CO is quite intensive. They do a visual inspection, Run the car on an AWD dyno to mimc real-life situations, check the ECU via OBDII for CELs AND test the fuel system for leaks as well as the gas cap!:(
California is the same excpet no AWD dyno. I had a friendly smog station that my independent mechanic uses. He explained that my IPD down pipe did not have a Californial stamp on it. But he also said no one looks that close. My 2006 has a particular problem so I went to a ref station. I passed all of the tail pipe test Last month
 

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Discussion Starter #16
California is the same excpet no AWD dyno. I had a friendly smog station that my independent mechanic uses. He explained that my IPD down pipe did not have a Californial stamp on it. But he also said no one looks that close. My 2006 has a particular problem so I went to a ref station. I passed all of the tail pipe test Last month
CKAVolvo,
It looks like you have a TME dp. I have a friend in town that has a TME dp and passed emissions. All of the other three instances I know of here in CO that didn't pass emissions were using an aftermarket dp other than TME.

The general consensus I see here is that CO has stricter emissions requirements and the cat on my Phuz dp does not suffice to meet emissions in any state that checks for NOx. Does that sound correct?
So, we've made a conclusion, but no solution :(

Aj
 

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I guess this is why it cost so much. As I back on it I'm glad I spent the $$$ on a " High price piece of pipe "

It will be nice to have a reference of what DP's pass smog in what states
 

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CKAVolvo,
It looks like you have a TME dp. I have a friend in town that has a TME dp and passed emissions. All of the other three instances I know of here in CO that didn't pass emissions were using an aftermarket dp other than TME.

The general consensus I see here is that CO has stricter emissions requirements and the cat on my Phuz dp does not suffice to meet emissions in any state that checks for NOx. Does that sound correct?
So, we've made a conclusion, but no solution :(

Aj
AJ, did you get that CAT nice and hot before the test? That helps.
 

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Discussion Starter #19 (Edited)
^Yeah a good CKAVolvo. A precedent "Caveat emptor" thread on what downpipes pass emissions in what states. I wish something like this was available when I purchased my dp.

For the record, Aftermarket Downpipes Emissions Stats...
  • EST downpipe will NOT pass in ...; but WILL pass in CA...
  • Evolve downpipe will NOT pass in ...; but WILL pass in GA...
  • Phuz downpipe will NOT pass in CO,...; but WILL pass in CA, MA,...
  • TME downpipe will NOT pass in ...; but WILL pass in CA, CO, NY ...
  • Race S60R downpipe will NOT pass in ...; but WILL pass in CT,...

I can update this too, if people would find that useful...?

Aj
 

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