well. I like the gains from RT Cats....
however!! The Rasp/rattle sounds is soooo ricy. I just downright hate them. I'm thinking about switching to something else now.
does crawford have rasp sound too????? I want to get rid of this ricy noise ASAP.

 

Switch them before they collapse. Most people are going with Kenetix or Crawford.

 

They're probably falling apart like mine did.

RT cats = crap.

 

ok I have noticed that Crawford is next best from the RT in terms of HP. howbout Ultimate racing CATs? I couldn't find HP rating with this cat. My #1 goal is to REMOVE the Raspy noise and pass emission. Crawford will generate ricy rattle that RT has????

 

well how do I know my cats are failing??!! I didn't notice any performance reduction like the car running like shxt. except the raspy noise is seems like getting louder.

 

Even Performance Nissan chose Crawford cats... after dropping their line of RT.

 

Crawfords=no rasp. I had RT's and they collapsed.


Good RT.



Collapsed RT.

 

I have the R/T cats. No rasp at all and lots of power.

 

Oh i was gonna get the RT cats, lucky enough i just read this posts...
I might end up going with resonated test pipes as well.
Do any of your guys who have High Flow Cats or test pipes have a check engine light?

 

Ditto, I love them.