The exhaust is a simple install on the 6.0L trucks.
Remove the exhaust from the rear of the truck forward. Unbolt the the downpipe at the turbo last. Once you get it unbolted, just take your time and snake it down. The 03 and early 04 trucks have an aluminum covering over the downpipe, which makes it a little harder. The 06 is easier, so you shouldn't have any problem.
I'd recommend an SCT with our custom tuning. It'll definitely take advantage of the extra airflow.
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