Most definitely it is confusing. When i call the different companies, they all just try to sell me their most expensive muffler. The only honest one was the guy at Flowmaster who took the time to tell me that the muffler that the exhaust shop was trying to sell me may or may not eliminate the drone i am getting. After talking to Bill this afternoon, I am going to set my CS back to stock this weekend when i get home to see if it is the canned Level 2 87 Tow setting that is contributing to my issue. If it is I just hope my PHP custom calibration will help eliminate or reduce the magnitude of the drone
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