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Old 10-07-04, 08:22 PM
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davesdeville davesdeville is offline
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Cadillac(s): 1995 ETC, 75 Deville, Cad500 powered 73 Apollo, 94 Mark VIII
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Join Date: Aug 2003
Location: Albuquerque, NM
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Re: cheap power improvements to the 425...

Quote:
Originally Posted by Night Wolf
my first thoguht is the cat... it's gotta go... my father mentioend something about thee first gen cats having a "drain plug" that you can take out, and the beads inside fall out, kinda like gutting the cat? On his '79 Coupe, he had a test pipe on it.. but I can't seem to find them anymore.... I don't think I could take it to a shop , even though it is now over 25 years old, and there is no emmisions testing... so what would the best thing seem to be?
There's about a 2" plug on the bottom of the cat. It's a pain in the ass to get it out, and if you can get it out there's a good chance you'll have deformed it so it won't go back in there. If you know someone with a welder you can just weld some sheet metal over the hole. I did this a few weeks ago and it did seem to make a good differance. I left the hole open for awhile and it was pretty loud...