Cats Exploded. Suggestions?

MoulaZ

BAD IDEA. TEST PIPES + MOTORDYNE WERE A BAD IDEA!!! CHRIST THE NOISE! It's loud before you even lay into it. When you plant your foot down, you could wake the dead. First cop to hear me and I'm done. I'm not convinced my pair of 100cpsi Cats are gonna do sh*t to combat this. =/

Guyfromthere

Video!

Did you consider getting ART pipes? They are quieter.

MoulaZ

Video will be coming.

And doesn't matter how large a resonance chamber you hang off a Test Pipe, it's still gonna be LOUD. Not to mention 4 times the price lol.

Guyfromthere

You can go stock exhaust and be mistaken for a hybrid car 24/7 like I was all last year

ChaseZ

It makes a massive difference.

ART pipes are light years beyond any other. And depending on the air moving through can actually be very quiet too. This from personal experience.

My god I couldn't stand the stock exhaust. Barely had it off the dealer lot and had the motordyne setup ordered!

MoulaZ

Sorry, I've heard various clips of ART Pipes and I disagree. The only major difference was the level of rasp. Noise level still went up.

ChaseZ

That's why I qualified it by saying it depends in the air going through. When I was NA I had Art+Motordyne with both Injen and Stillen CAI's. With the Injen it was loud and raunchy and could hear it blocks away whether you were WOT or not. With the G3 it was as quiet as Motordyne + factory cats, which is not loud whatsoever.

Internet doesn't trump real life experience.

shadow85

So MoulaZ are you keeping the TPs or are going to get CATs on soon?

MoulaZ

Keeping TPs, waiting to find a buyer for my current Motordyne then going Invidia.

MoulaZ

By the way, for those curious for what the Cats actually looked like after exploding, here's a before & after.

When it happened, got the CEL flashing at me every time I tried to rev and it struggled... but strangely it didn't generate a code.

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Jayhovah

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Jinxx

Lol just knock out all the broken pieces in both .... there you go straight pipes for free lol

ChaseZ

How long before they went boom?

unijabnx

about to say the same thing

MoulaZ

Well here's the very important thing. Prior to this happening I was struggling to diagnose weird AFRs on Bank 2, the same Bank that ended up dedonating that Cat.

Only Bank 2 went. Bank 1 is the 'before' photo.

Turns out my Plenum gasket had developed a very small tear, for the Cylinder 6 runner and was the cause of my whacky AFRs.

What I suspect happened was one day while conducting some 'tests' and revving it out, right after I hit redline (and rev limiter) I heard a small pop followed by brown smoke bellowing out my exhaust, which I think I mentioned already in OP. Had I not had the AFR issues on that Bank 2, probably wouldn't have happened I think. Could have been a little bit too much fuel was dumped, and ignited in the Headers and blew out the Cat? I dunno, but it seems kinda plausible.

Photo of the tear I'm talking about:

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