sawzall.... about 5 minutes. Id just buy a 4 inch front pipe without a cat... if you wanna keep the stock exhaust on it there are front pipes out there from MBRP and Dynomax that still utilize the four bolt flange so itll bolt right up. They can be had for about $120 from jegs or summit. Also on the newer trucks its likely you will throw a code with no cat and a bigger exhaust.
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