The Quiet Flowmaster?

Yeah ,it does disappear below or above 2500 rpm, but it`s like my car is tuned to the same frequency as the mufflers between 24 and 26 hundred rpm. Sounds like a B-17 in the backseat. I guess like dgc said , I could go with the 70 series to quiet it down but then I`d feel like an idiot buying the same part twice.