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Depending what year you have I believe they discontinued the TRD supercharger program with the 15 model year. I kinow there was a frantic search for awhile from the guys that had 15's to find dealers that had them in stock. Mine will be going up for sale in a couple months. It has 67,000 miles on it right now.
Well, mine is a 2018 and when I’ve asked 2 local dealers about it they look at me like I fell out of a tree.
They did tell me that a TRD performance exhaust wouldn’t affect my truck warranty.
ETA:
Again, many thanks.