I live in NY and have an '08 GT. The JBA H Pipe High Flow Cats, what other options are there available for high flow cats to install after JBA long tube ceramics that will pass inspection in NY?

Asked by Dec 31, 2014 at 02:37 PM about the Ford Mustang

Question type: Car Customization

1 Answer

565

There should not be an issue as long as you have your smog stuff on it. If your cats are new it should not be a problem. I know on my 92 I have the smog pump removed heads capped off and still pass the sniffer..Only issue is your cats will clog up faster then normal...No performance gains, "maybe one horsepower." It just helps keeps the engine cleaner on the inside not having to recirculate that nasty exhaust. Once you remove your cats you will not pass inspection...I do not recommend removing your smog equipment. The only reason I did was because it broke. I was having exhaust leaks from the system causing wrong O2 sensor readings making the engine run rough at certain RPM's.

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