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Old 07-22-2014, 01:32 PM   #1
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Delete Cats or not

I have a 2013 GT A6, which I have just installed the*Boss 302intake, Roush CAI,*Borla*Catback exhaust*with X pipe and had it tuned with the X4 from SCT at Stang Hi.

Should I delete the factory cats and add a off road x pipe, or should I get a catted x pipe from Kooks, or should I just leave it be?

What would I gain or lose?

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Old 07-22-2014, 02:38 PM   #2

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If you remove the cats, keep them for re-install at a time when you go to sell the Mustang or trade it in. It's been discussed here on this site many times; federal law supersedes any local or state laws. Federal law prohibits the removal of them, so a police officer in a bad mood can pull you and fine you. If you go to seel the car, a dealer will have to install them in order to resell the car. If you sell it privately, you'll need to re-install them ti follow the law.

But many don't, and get away with it. Its your call.

It is better to keep your mouth closed and let people think you are a fool than to open it and remove all doubt.
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Old 07-22-2014, 06:08 PM   #3
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The horsepower gain at most is minimal and will not make your car faster, just louder and illegal.
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Old 07-22-2014, 06:22 PM   #4
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I picked up 3/10 going to an off road H-Pipe. I'd say those gains were pretty good.
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Old 07-22-2014, 09:39 PM   #5
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I noticed some gains of mine too
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