resonator

[Guest md80man]

Hi Folks I need a new exhaust system from the cat and back.

(Sorry if this has been covered before.)I need a muffler but I have been told I do not need the resonator.

I am not quite sure what it does anyway, but I am guessing it has

something to do with noise. The question is does it have an epa.

purpose? I live in PA and we need an emission sticker every year.

It is a 92 SE V6 and I do not need anything fancy.

Thanks in advance.

Edited April 1, 2005 by md80man

[mws]

The only thing that really affects emissions is the Cat.

The resonator is a secondary muffler, usually tuned to cancel out specific frequencies of sound to pass sound level requirements. Removing it could increase pollution emissions, but it would be highly unlikely.

 

Whether you need it to pass inspection depends on your state and the inspector.

 

In CA, ANY deviation from the exact equipment installed by the factory is technically illegal. But in practice, I have never heard of anyone failing smog checks for changing to an aftermarket muffler or eliminating resonators. As long as the cat is there, there is some kind of reasonable muffler, and it passes the sniffer, they are passed.

 

Of course, with the budget crunch, it would be a HUGE revenue generator for the state to start collecting fines for these technical violations.... Probably 90% of the vehicles more than 5 years are somehow violating the laws as written. DOHHHH, shouldn't have said that out loud...

[statikuz]

This doesn't really answer your question but it talks about exhaust:

 

http://www.nissanpathfinders.net/forum/index.php?showtopic=4356