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How finicky are these GMs with aftermarket cats? I want to pass emmissions in my state of Pa. I have SLP long tube headers with the cats gutted out. I want to replace the system with new Catalytic converters. What do you recommend? The vehicle is a daily driver so it have more than 5000 miles a year so emissions will not get exempt.
 

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Solo High Flows are really good too.
 
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