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Removing the 2 small cats

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Posted by: 95Marklll(Kingcobra)

What is intalled on removing the small cats off of the manifolds, cut them off yeah what about the sensors what do I do about them? Wont I trigger a code to pull up or something what do I do, please help.

Posted by: Redwingvksm

Assuming this vehicle is for OFF-ROAD ONLY, you could gut the cats if they are bad. That's what I did with my Town Car (It's a 1987 but had the 4 cat system 2 on each bank)

Got emissions in your state? Just leave it alone. Or just take that pipe down, cut off the cats, replace the cats with a piece of measured out straight pipe AT THAT ANGLE (It's very important the angles stay the same, or your connections after them will not be right)

Posted by: MarkVIII93

You actually have to separate the driver's side cat(cut it off). Then you have to have 02 bungs welded onto a piece of straight pipe.

Posted by: Redwingvksm

Exactly. That's the best way IMHO - I don't know of any aftermarket for thoes pipes...

Srry man

Posted by: MarkVIII93

Oh and to answer whether you will trigger a code or not.... Assuming you have a 95(pre obd2), then you only have 2 02 sensors BEFORE the cats. If you had an obd2 car, i think you might get a code due to the after cat 02's?

Posted by: gangstaMK8

i had mine taken off and i dont get any codes or problems with passing emissions my main cat is a high flow thats it

Posted by: MarkVIII93

Quote:

Originally Posted by gangstaMK8

i had mine taken off and i dont get any codes or problems with passing emissions my main cat is a high flow thats it

How much did it run you to get them removed?

Posted by: 95Marklll(Kingcobra)

OK so all I do Is cut them off and reinsert them into a pipe that takes the place of the cats? Its a 95 so there before the cat idk do they have to go back, the sensors.

Posted by: 95Marklll(Kingcobra)

And another thing, lol, will I need to get my car tuned if I cut out the 2 small cats and muffers out back will that require a tune? J-mod VS. Chip for better shift points which is the cheaper of the 2 and best for the tranny, thanks.

Posted by: MarkVIII93

its unlikely that tou will need to tune your car.

Posted by: 95Marklll(Kingcobra)

k, thanxs

Posted by: gangstaMK8

Quote:

Originally Posted by MarkVIII93

How much did it run you to get them removed?

cost me 400 for the whole setup high flow cat and the 2 small ones removed a resonator put on and my 4 inch tips but the guy that did it didnt leave old pipe on the car he put all new pipe

Posted by: MarkVIII93

Quote:

Originally Posted by gangstaMK8

cost me 400 for the whole setup high flow cat and the 2 small ones removed a resonator put on and my 4 inch tips but the guy that did it didnt leave old pipe on the car he put all new pipe

I already have full 2.5" exhaust. Im just looking to get rid of the cats. And considering that our exhaust manifolds are NOT cast iron, we can weld new flanges on them. right?

Posted by: ONEBADMK8

What is the purpous of removing the cats anyway?

Posted by: Dominus

I agree. For all of the effort, I would so go with headers.

Posted by: ONEBADMK8

The new cats flow good up to at least 450hp. Unless your planning huge power you will lose alot of low end if you drop them or "gut" them. Big gears and converter will help though.

Posted by: MarkVIII93

Quote:

Originally Posted by ONEBADMK8

What is the purpous of removing the cats anyway?

Its all about the db's. Im going to install a 4.10 in a few weeks anyways, so I'll be good.

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