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Has anyone ever done it? I have one on my truck that's been rattling. If you have done it, did it pass smog? Pretty easy to do?
I wonder if anyone knows what I'm talking about.+1 hate when you get no responses
You take a piece of pipe and beat the guts out of the catalytic converter. Sounds brutal but they are pretty restrictive inside. I have 3.5 inch exhaust, but it looks like it gets choked down to about half that going into the cat. There's actually a screen at the inlet. Old school street ra er trick. Put the cat back on and visually looks like it did when it rolled off the assembly line. Heap horsepower.As in just increasing diameter inside with a tool or something ?
We dont have smog in mississippi but both my stangs have gutted cats with x pipes and if you have to pass smog emission there then i can honestly say you would probably fail. Most ppl cant stand by my cars long because the smell is so rich. But man it makes the exhaust sound wonderful!straybullitt said:Anyone else? I'm still curious if anyone has ever done this and still passed smog. I thought that it was the Mustang guys that invented this trick. Maybe I should have posted this in the ppushrod forum...
You would b surprised some of the stinkiest exhaust I have seen pass emission like to the point you felt like you would pass out lol n others u couldn't even smell fail. Smell isn't always a bad thing lol.We dont have smog in mississippi but both my stangs have gutted cats with x pipes and if you have to pass smog emission there then i can honestly say you would probably fail. Most ppl cant stand by my cars long because the smell is so rich. But man it makes the exhaust sound wonderful!
I can believe it. If you can pass with it its worth itGReese87 said:This is a tricky question because it depends. Here in nj we don't have smog but we do have emissions testing and I use to work for the inspection station years back and I have seen cars with cats fail and cars that have straight pipes pass, it mostly depends how your car is running how clean it runs. Basically what I mean is the cats are only work when they have to if that makes me sense if your motor is running clean the cats are just there if your car is running dirty that's when they actually so their job. It doesn't really give you an exact yes or no answer but just an idea lol.
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You would b surprised some of the stinkiest exhaust I have seen pass emission like to the point you felt like you would pass out lol n others u couldn't even smell fail. Smell isn't always a bad thing lol.