Catalytic converter -- stock or aftermarket?
#1
Newbie
Thread Starter
Catalytic converter -- stock or aftermarket?
So apparently the underbody cat on my almost stock Evo8 is shot, which is what is making it rattle after 4000rpm. Also a small exhaust leak on the stock resonator, which I can weld up myself.
I don't want to go catless/testpipe since I have to do emissions next year and I have a feeling that I wouldn't pass otherwise.
Other than OEM (which seems to be around the $900 mark...) what other options do I have that would be a bolt-on affair doing it myself? If I go with one of the multitude of highflow cats, or aftermarket cats, do I need to do a tune afterwards, i.e. get a check engine because the post cat O2 sensor gets a reading it doesn't expect? What about your run-of-the-mill exhaust shop and their off the shelf aftermarket cat?
Trying to keep it cheap and easy.
Thanks!
I don't want to go catless/testpipe since I have to do emissions next year and I have a feeling that I wouldn't pass otherwise.
Other than OEM (which seems to be around the $900 mark...) what other options do I have that would be a bolt-on affair doing it myself? If I go with one of the multitude of highflow cats, or aftermarket cats, do I need to do a tune afterwards, i.e. get a check engine because the post cat O2 sensor gets a reading it doesn't expect? What about your run-of-the-mill exhaust shop and their off the shelf aftermarket cat?
Trying to keep it cheap and easy.
Thanks!
Last edited by fuzzycuffs; Sep 14, 2017 at 10:02 AM.
#3
EvoM Guru
iTrader: (12)
Have you thought about just picking up a universal cat from autozone and having an exhaust shop weld on flanges? You could use it just to pass smog and it's much cheaper.
http://www.autozone.com/emission-con...07_460559_5320
http://www.autozone.com/emission-con...07_460559_5320
#4
Evolved Member
iTrader: (22)
So apparently the underbody cat on my almost stock Evo8 is shot, which is what is making it rattle after 4000rpm. Also a small exhaust leak on the stock resonator, which I can weld up myself.
I don't want to go catless/testpipe since I have to do emissions next year and I have a feeling that I wouldn't pass otherwise.
Other than OEM (which seems to be around the $900 mark...) what other options do I have that would be a bolt-on affair doing it myself? If I go with one of the multitude of highflow cats, or aftermarket cats, do I need to do a tune afterwards, i.e. get a check engine because the post cat O2 sensor gets a reading it doesn't expect? What about your run-of-the-mill exhaust shop and their off the shelf aftermarket cat?
Trying to keep it cheap and easy.
Thanks!
I don't want to go catless/testpipe since I have to do emissions next year and I have a feeling that I wouldn't pass otherwise.
Other than OEM (which seems to be around the $900 mark...) what other options do I have that would be a bolt-on affair doing it myself? If I go with one of the multitude of highflow cats, or aftermarket cats, do I need to do a tune afterwards, i.e. get a check engine because the post cat O2 sensor gets a reading it doesn't expect? What about your run-of-the-mill exhaust shop and their off the shelf aftermarket cat?
Trying to keep it cheap and easy.
Thanks!
#5
High flow cat
Sorry I know this thread is kinda old but can't find anything about this, on my second cat i have a downstream o2 sensor if I install high flow cat and move the o2 down will it throw a cel again thank youfor the help
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