I have the popcharger, RT high flow cats and NISMO exhaust. Overnight the sound went from fairly loud and raspy to deeper tone and no rasp. I had it up on a lift, no leaks anywhere. I do not notice any performance loss, it still accelerates well and revs freely. Any ideas????

Thanks for any input.

 

Your RT Cat may have blown out...

 

I was hoping that wasn't the case. Is there a warranty on them or not?

 

I am not sure what they are doing as far as warranty these days, but there should be...

You would have to remove the cats and check them...

then...

contact who they were purchased from and they can arrange the warranty exchange with RT...

 

Thanks.

 

impossible

 

^ was that sarcastic?

 

Great. That added absolutely nothing to my issue.

Thanks to Jason for adding something positive.