May have found a solution for the drone on the cheap ebay exhausts!

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Originally Posted by tommy583

I have tried the baffle set up in a cheap Ebay exhaust. I tried different size ones, different places in the exhaust, only one side and both sides. In the end I was never really happy. I ended up just modding the stock muffler. So much better. It sounds like a proper sports car now and no drone.

I second that.
A few pounds is well worth proper sound with no drone.