I had several rattles after installing my delete pipes during the 200 mile relearn period.
I just kept a few wrenches and sockets handy when I'd pull into my driveway.
1) the tailpipe section had shifted and was hitting the heat shield for the spare.
2) the c clamps required one section to be tightened. (Allowed tailpipe section to twist a bit hitting heat shield again)
3) both hangar clamps needed snugged up.
Went in that order, each presented after about 50 miles or so and came after one another (or I didn't notice it until fixing the first)
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