I would go as close to the same cell count as stock whatever you do. It'll save you headache if you happen to not pass with a lower cell count later on. I personally would not want to be swapping HFC and stock cats every x amount of time just to pass inspections.
Right on the Z1 site
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The Z1 High Flow Catalytic Converters are a great upgrade while keeping your car "49 State Street Legal".
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318hp/255tq made by FI Res Test Pipes, FI Non-Res Catback, Z1 Intakes, and EcuTek Tuned by RS-Enthalpy
Last edited by ColtronZ; 06-04-2019 at 02:24 PM.
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