[CrazyRoyExhaustfreak]

Need Help
Gut it /hllow it out
buy new over $150
rip it off and replace w/pipe

1992 GMC 1/2 ton 4x4 350
will not even go past 65 mph even if pedal is slamed to the floor , Slugish up hills, smells like rotten eggs (BAD).
the exhaust on this truck has iron manifolds, CAT, 3 ft pipe, and nothing else.........rest of exhaust kinda fell off while doing 55 mph down the freeway(opps). It wasn't any good, it was an old rusty flowmaster 1 chamber and the whole piping looked kinda like if it was pieced together by a blind man.

[Gr8 '48 bow tie]

I would never tell you to break the law by tampering with a CAT. EPA kinda frowns on it, ya know what I mean. However..
if you do not have state regulated safety inspections ..........

Al

[home brew]

Since I live in Canada where it is not a problem to remove cats go ahead and remove it before it falls off going down the freeway and kills someone. If it does it won't be oops anymore.

[ChevyTruckGuy]

I'm all for keeping the smog levels down. so a performance cat would be the way to go.
I kinda like breathing fresher air. You only get one pair of lungs.

Craig

[matt167]

cat converters have no restrictions actully, buying a hi flow cat, is just in a larger diamater that is supposto flow better, but dosn't really.

[USA1]

Summit has universal cats starting at $53.00. Weld or clamp it on and be done with it. Catco brand name.

[Kevin45]

The universal cat is one way to go. On my '93 Silverado, I had the cat removed because the muffler guy screwed it up (long story) but I replaced it with a Thrush muffler (Cherry Bomb knockoff) and ran my pipes off of it. The muffler is a straight thru. The truck sounds good but not too loud.

Kevin

[poncho62]

Originally Posted by home brew

Since I live in Canada where it is not a problem to remove cats go ahead and remove it before it falls off going down the freeway and kills someone. If it does it won't be oops anymore.

Try moving to Ontario....they are super strict here about such things.

[jimfulco]

The brick in mine turned sideways, so I busted it up with a tire tool & put it in a ziplock bag. But mine had a good pair of mufflers behind it, so nobody noticed, except for all the horses that got turned loose.

[bigolblackie]

Originally Posted by poncho62

Try moving to Ontario....they are super strict here about such things.

I wouldnt say they are super strict about it. Nobody has looked under my truck to see if I have them or not. I have twin magnaflow cats,and they were only $60 each. I passed the emission test without the air smog pump on.In Ontario,as long as you can pass the emmision test,then your good to go. I recomend buying a new universal cat.

[cruiser22]

I would say take it off. either gut it or pipe it. I had one replaced 3 months ago and its going bad. It was a new one that was lying around mechanics shop. have a feeling it was to small for my truck. I dont know about the full size trucks. but with a s-10 if you take it out completely the o2 sensor goes nuts. have to have a simulator or somethinganotherdoohickey.

[jimfulco]

'96 and up with OBD-II has an O2 sensor downstream from the cat, and it will throw a code if the cat isn't working. Earlier cars generally don't know the difference.