SONICBOOST3

I would like to know if any of you have experienced or heard of a cat blowout/failue and if so what was the result ( engine failue/ less back pressure). I would like to know because I am putting some highflow cats on my prochamber but I am a little weary. I have only heard of one person having an engine failure from a cat blow. Others I have heard the material inside the cat just crumbled, but there were no serious problems. Whats usually the result when a cat blowsout or fails... Thanks

-Adam

Edit- These are the cats I will be going with
http://www.ninosport.com/Eastern-Met...llet-Cat-79125

Hufenstang

high flow cats hold together a lot better than the stock ones, i had a cat blowout on my stock ones it just started making noises underneath and you could tell there was an air restriction some where. I put on some high flow cats that have a life time warranty and havent had any problems since then

Texotic

from what i've heard, the material in the cat just crumbles and gets blown out of the exhaust. if you have a chambered muffler, some of it may get lodged in there (or your pro-chamber), but it shouldn't do anything to the engine.

d_ames117

I just had an issue in my Monte Carlo where the material in the cat crumbled and blocked the exhaust causing a severe power loss but no engine damage.

Dustin

ajaibr

The catalyst itself is a honeycomb like substrate that would typically not totally plug the exhaust if it crumbles. The matting that its mounted inside the converter with could block it though. Of course that would mean enough of that mat would have to get loose and lay across the front side of the catalyst to block it. If it did, It would pretty much burn up and crumble also because it can't really handle direct heat that well. I've used that same matting in a non-auto application and seen what happens to it at elevated temps when it fails... Not much left of it and flow was maintained.

Basically, if it all failed it would get really loud and you'd probably start throwing codes because of your O2 sensor freaking out.

Mudflap

I've only heard of this happening a couple of times, and in those cases the cats were in front of a turbo which = bad. Odds are in the unlikely event the cat came apart on a Mustang, that you wouldn't have engine damaged assuming there was nothing but exhaust behind the cat...

05 Mustang

LOL....at around 17,500 miles I blew my cats out my exhaust pipe. I didn't experience any issues, just went to the dealer and they replaced them under warranty....told me this was the only time they were going to do it and that I should get a set of high flow's.

SONICBOOST3

Yeah I was thinking the odds of a cat blowing out and damaging the engine are highly unlikely. But the one case where the cat did cause engine failure the cat went upstream toward the engine rather than out the back. I don't understand how the cat could go upstream unless it happened inbetween shifts but still the odds of that happening are not that great so i'm not gonna worry too much about it.

SONICBOOST3

Wow thats wild, I have never heard of the stock cats failing at such low miles. Was the full exhaust stock?

05 Mustang

the exhaust was all stock with exception of the flowmaster mufflers..