LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Can I remove the CAT at home?

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Old Feb 6, 2003 | 02:24 PM
  #1  
Greasepunk's Avatar
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From: Baytown, TX
Can I remove the CAT at home?

What all is involved with removing the cat? What tools do I need etc? I plan on taking it off gutting it and then putting it back on, this is a temp fix until I get a highflow or just replace the cat with pipe...any tips or trix would help also! Thanx fellas
Old Feb 6, 2003 | 02:36 PM
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Geoff Chadwick's Avatar
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pull off the catback, raise the car. Get an air hammer or hammer and chisel. Hack away. Get a small brush to wipe dust and such. (Wear a mask for safety) and keep at it. Start car and rev engine. Sweep floor. Put cat-back back on Otherwise, you'll need to un-weld it to the y-pipe.

Of course, this is only theoretical, but you might do this if you could weld another converter on for street use.
Old Feb 6, 2003 | 02:45 PM
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well that sux, I was hopin it was bolted on the front and back with 2 flanges and not welded to the Y-pipe, I dont have a garage so I have to do repairs infront of my APT and they dont like 'major repairs' to be done to automobiles in the complex...no other alternatives? What if I unbolted the cat-back let it drop down and punched it all out with a long scredriver and hammer then rehooked the cat-back back up and revved it, would this clog any of my exhaust up or will it all just blow out the muffler in chunks? I have a flowmaster muffler...if that matters...
Old Feb 6, 2003 | 03:01 PM
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Geoff Chadwick's Avatar
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Originally posted by Greasepunk
What if I unbolted the cat-back let it drop down and punched it all out with a long scredriver and hammer then rehooked the cat-back back up and revved it
That is about what you do... But I would not attach the catback till after you revved it hard a few times. You will want it up so you can get under it. It will be loud when revved - but I wouldnt want that stuff going through any muffler if possible in that amount. Could clog it... Not likely a flowmaster, but it could.
Old Feb 6, 2003 | 03:04 PM
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You can't remove the cat unless you have a welder, or have a removable cat setup which most Y pipes do not have, stock surely does not.

Take off the Y pipe, and jam the stuff out, then put the Y pipe back.
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