i recently passed smog in the CA using my friends new cat because my old cat is so old it doesnt pass smog anymore. my question is.. since i passed smog, i will be returning the new cat to my friend.. is it a good idea to poke a hole thru my old cat for more power gains?
Re: poking a hole thru a cat converter.. good idea? (Racermech)
i wouldnt do this,
however, i know here in PA a lot of vehicles have visual emission testing, so people punch their cats out and then run a piece of pipe through the cat. I've heard that just punching the cat actually doesnt create any gains beause the air then flows into that large open chamber and that creates just as much restriction as having a legit cat. Thats why you'd want to run a piece of pipe through it. Really though.. id just buy a performance cat or a test pipe.
oh yeah.. if you do punch it out, dont breathe that **** in, i hear its really horrible for your lungs, and make sure you dont leave the stuff that comes out of it out where an animal could get at it or anything, try to dispose of it in a safe way.
gutted cat has a buzz tone, its better if a cop looks under your car, but i prefer test pipe...but in CA a ticket with no cat is $3000. friend got caught before so i would stick to your gutted cat if you dont care about the sound. oh yeah and Arizona is the same fine also. $3000 or around there.
Re: poking a hole thru a cat converter.. good idea? (mrdeadman)
I heard whenever you "gap" the exhaust pipe, it is bad for the car, because the motor is very hot and then when you turn off the car and let it sit, cool air goes inside the motor and can screw things up since the internals can bend or something from the hot and cold crap, so I thin cutting a hole in the cat is bad.
also dc2rtek, if the cop pulls you over and you have a test pipe it is a 3000$ fine? Holy ****! Also if you have an exhaust pipe, can they fine you for it if it aint over 93 decibals?
DB squad #155
Current Cars: 1994 Acura Integra LS-Vtec, 2003 Mini Cooper S, 2002 Honda S2000
Past Cars: 1987 BMW 325is 1st car Sold, 1995 Honda Civic 2nd car Sold, 1991 Mistubishi GST 4th car Sold, 1992 Acura Integra GSR 5th car Sold
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