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Today we are going to look at 3 popular exhaust systems for the Porsche 981 Boxster / Cayman cars.  Each of the systems we are going to talk about are 100% bolt on - no cutting or welding required.  None of these exhaust upgrades require an ECU tune, and will not cause a check engine light.  While cat backs can generate a small gain in horsepower, we recommend a set of headers first if power gain is your primary goal, but if your goal is sound enhancement - READ ON :)Agency Power& …