Emissions and Hi-flow Cats
08-24-2016, 07:14 PM
#1
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Emissions and Hi-flow Cats
On my 2011 GS, I installed Stainless Works headers, high flow cats and x-pipe. It could not pass the emission test in North Carolina even with extensions on the O2 sensors. I was told by one shop that Kooks was the only one that produced true emission friendly cats. Now that I have my 2015 broken in I am looking at the same set up, but ARH headers and hi-flow cats have been recommended and I am gun shy. Anyone have any experience with passing emission tests with high flow cats, in particular ARH?
08-24-2016, 08:25 PM
#2
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why didn't it pass inspection? did they measure the actual emissions?
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1ccrider (08-25-2016)
08-24-2016, 08:33 PM
#3
Usually the tune can help get away with it, but just go with the Kooks "Green" cats and call it a day. A couple of people I know that run them and they pass emissions.
Good luck!
Good luck!
08-25-2016, 06:15 AM
#5
On my 2011 GS, I installed Stainless Works headers, high flow cats and x-pipe. It could not pass the emission test in North Carolina even with extensions on the O2 sensors. I was told by one shop that Kooks was the only one that produced true emission friendly cats. Now that I have my 2015 broken in I am looking at the same set up, but ARH headers and hi-flow cats have been recommended and I am gun shy. Anyone have any experience with passing emission tests with high flow cats, in particular ARH?
08-25-2016, 11:56 AM
#6
Drifting
There is no sniff test in NC so why is this even an issue as long as your car isn't throwing a CEL?
08-25-2016, 12:23 PM
#7
Supporting Vendor
most states do an OBD diagnostics test now.. and you will not pass with trouble codes thrown.. which is what will happen with those mods.. you need to get a tune in order to have the necessary trouble codes disabled that get triggered by the headers and high-flow cats.. then you will pass just fine.
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06MonteSS / DiabLew Tune
2014 Camaro 2SS/RS LS3, short-throw shifter, NPP perf. exhaust, BMR strut-tower brace, Cold Air Inductions cold air intake, catch-can, ported/polished TB, Custom DiabLew Tune
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com
06MonteSS / DiabLew Tune
2014 Camaro 2SS/RS LS3, short-throw shifter, NPP perf. exhaust, BMR strut-tower brace, Cold Air Inductions cold air intake, catch-can, ported/polished TB, Custom DiabLew Tune
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com
Last edited by 06MonteSS; 08-25-2016 at 12:23 PM.
08-25-2016, 09:10 PM
#8
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that's a good point monte, I think we all assumed he had a tune to go with his headers. I know I did! woops.