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Cat Converter Removal

10-18-2008, 01:44 PM
92 4.9 L ElDorado.

My cat is rattling and clogged and my gas pressure is sucking horribly because of it.

I register all of my vehicles in a county where emissions inspections aren't mandatory and I'm considering completely removing the cat in exchange for a straight pipe to the exhaust.

I know that, federally, this isn't acceptable, but I'm not too concerned with that portion of it.

My concern is that I won't get enough blowback with the converter completely removed and my 02 sensors will probably start throwing codes.

Anyone have some input on this?

10-18-2008, 06:51 PM
Federal offense, replace the cat with an aftermarket, around 200.00!!

10-19-2008, 09:16 AM
Notice the part where I said I wasn't concerned with that portion of it.

I don't want a cat, and definitely don't want to spend 200 bucks on one. I'd rather spend twelve on a pipe and tig it into place.

My question wasn't about the legality of it. I'm concerned with the 02 sensors going apeshit and not getting enough blowback.

10-19-2008, 02:27 PM
Our policy on AF, is not to advise on any condition that would be unsafe or illegal, sorry.

10-23-2008, 02:59 PM
So lets just say for the sake of argument that I plan on using the car strictly on the track. Given that scenario, any advice on this issue?

10-23-2008, 07:03 PM
Removing the car will not have any adverse effects, some back pressure is required for the egr system though.

10-24-2008, 12:21 PM
Max, that sounds kind of contradictory. Did you mean that removing the cat will have no adverse effects on the 02 sensors, but WILL have effects on the EGR? I kind of figured the EGR would be effected, but my thoughts were that it wouldn't restrict performance. You thinking it'll be throwing codes?

10-24-2008, 03:33 PM
It may and based on your projected use, so what.

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