Can I remove/hollow catalytic converter?
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Cadillac Seville / Cadillac Eldorado Forum Discussion, Can I remove/hollow catalytic converter? in Past Cadillac Vehicle Discussion; New to the forum, new to Caddy's... On my 2002 STS, is it possible to remove or hollow out the ...
  1. #1
    the recluse is offline Cadillac Owners Connoisseur
    Automobile(s): 2002 STS, 1991 Eldorado
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    Can I remove/hollow catalytic converter?

    New to the forum, new to Caddy's...

    On my 2002 STS, is it possible to remove or hollow out the converter without any repercussions, or is it plugged into the computer system somewhere?

    Thanks guys for your time.

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  3. #2
    iowasevillests is offline Cadillac Owners Enthusiast
    Automobile(s): 2003 Cadillac Seville STS 73k Miles, '90 Chevy 1500 Reg Cab
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    Re: Can I remove/hollow catalytic converter?

    Well anything is possible.....however I wouldn't recommend it as it will cause havoc with the readings coming from the downstream 02 sensor which will in turn cause the computer to try and adjust fuel mixtures and likely throw check engine light because it can't compensate for it. Why are you wanting to do this???? If its cause your CAT is plugged they're 158 bucks on RockAuto....GM Parts Direct will only sell an entire CAT Back system but I'm sure you can get just the CAT at the dealership. If you're looking for more power good luck, read up on the forums as the Caddy Engineers did a good job of getting it all to begin with, there isn't a ton of tuning available on these cars.....in terms of exhaust Corsa makes about the only bolt on aftermarket kit that will work with these cars, sounds awesome but its going to run you around 800 to 1k.

  4. #3
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS/65500mi, 2004 Ford F150 SuperCab4x4
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    Re: Can I remove/hollow catalytic converter?

    WHY ??? The OEM convertor is a high flow honeycomb substrate unit which offers essentially no backpressure to above the design engine redline.

    .......and, yes, lots of stuff is sensed and calculated by before-and-after cat O2 sensors. Screw with the cat and your engine control system goes down the tubes.

    Resist the urge to rely on rumor and old wives' tales: keep it clean, don't spend $$$ on snake oil, and enjoy the ride.

    What is the build date of your STS ?? Driver's door sticker. Look at the sticker under the spare tire cover and enter all the 3-character codes into www.cadillacinfo.com/rpo/index.php . Now you know what's in your car. If you have an F55 STS (late 2002+) you're fortunate.

  5. #4
    the recluse is offline Cadillac Owners Connoisseur
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    Re: Can I remove/hollow catalytic converter?

    Why is because I have been having problems with gas consumption lately, but that is going on another thread...

    So if nothing is to be gained by either removal or bastardizing the cat then I shall consider it an education learned from people who sound like they've spent the money on trying this before.

    Thanks fella's and my next thread has me scratching my head (in suspension)

    Also the link you posted is dead for any info, it only goes to an online Caddy dealer.

  6. #5
    iowasevillests is offline Cadillac Owners Enthusiast
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    Re: Can I remove/hollow catalytic converter?

    If you're having problems with poor mileage......post that....not a jump to wanting to pull out the CAT. There are LOTS of threads on poor mileage.....use the search feature and read up on several, then go pull the beauty cover off the engine and check your regulator.

  7. #6
    the recluse is offline Cadillac Owners Connoisseur
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    Re: Can I remove/hollow catalytic converter?

    thank you, will do.

  8. #7
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS/65500mi, 2004 Ford F150 SuperCab4x4
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    Re: Can I remove/hollow catalytic converter?

    My bad........transposed a link code. Try

    www.cadillacfaq.com/rpo/index.php

  9. #8
    CadillacSTS42005's Avatar
    CadillacSTS42005 is offline Banned
    Automobile(s): 2005 STS4 1SG: GM Acc Lights, Corsa, Platnium Grille, Volant
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    Re: Can I remove/hollow catalytic converter?

    Corsa
    period
    thats the only performance for HP mod you can buy freely

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