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so my highflow cat is going out i think, something inside it rattleing. Should I just do a test pipe from atp or ecs? will there be any issues come inspection time? located in york pa, thanks guys.
 

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When you remove your cat, you are going to throw a code in the system. This will not allow you to legally get inspected. You can remove your cat without any errors with a software delete (unitronic, and some other companies) or you could purchase a 42dd o2 sensor spacer to change the depth of the o2 sensor in the pipe. This will make you check engine light free
 
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