Im on my 3rd set of mufflers on my 69 bird.I think im going to try the factory type with small resonators under the car and the Xflo in front of the gas tank.At 2000 i have 84 decibels in the drivers seat.I really think my best set was the Hushpowers made by Flomaster,Super Turbos were the worst and the stock type supposed to be quiet are not much better.Was worse with a X pipe than a H pipe.Tom
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