It wasn't too bad though things like replacing an exhaust system tend to be a little easier for me since I have a lift.
Anyway, the main hassle in my case was mating the headers to the exhaust. If you use any brand other than TTi for headers, you will have to make adapters to connect the collectors to the exhaust system. TTi does provide the extra tubing in the kit to do the job, it's a matter of measuring/cutting/welding the pieces and getting them oriented right which can be a little tricky. The rest of the system fit perfect, nice and level.
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