hoeky_b
Active member
I need to replace my exhaust system on the MH. Is it a federal law to have a catalytic converter on the system? can I run a straight pipe and muffler?
1993 MH Exhaust
- Thread starter hoeky_b
- Start date
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Charlie 5320
Well-known member
IF it had one from the factory, and IF you have to have the vehicle inspected where you have it registered, then most likely it WILL need a converter to pass. Why would you not want one? It won't be anymore fuel efficient without it, and it may stink without it.
Gary RV_Wizard
Site Team
X2 what Charlie says. But if you live in a state without any emissions inspections, nobody is ever likely to ask unless you break local noise ordinances.
99dart
Well-known member
hoeky_b said:
Do you have to have an inspection to renew license/registration now? If not, you can remove the cat convertor (it may not be Fedrally legal) but, the county won't know the difference. Also, you may have an engine light come on when the pcm doesn't detect a correct reading from the O2 sensors. And, if the O2 sensors give the wrong readings the pcm could default to a richer fuel mixture, totally killing fuel economy. If the cat is plugged it can really overheat and reduce power substancially. I would then look for a hi-flow cat convertor, much cheaper than OEM.
hoeky_b
Active member
I don't think it has any O2 sensors in the exhaust, because of its age. I will take a look at it more closely.
