I recently noticed a vibration at about 50 to 60 mph only when on the throttle enough vibration that it makes suff rattle in my truck. I recently noticed that the muffler has rusted through the seam on the bottom of it from this horrible winter. My question is should I replace it with the genos muffler delete or a stock muffler. Im not one for loud sound inside the cab I dont really care how loud it is outside. Does the genos make it loud inside the cab? BTW i just had the tires balanced and the u-joints checked to see if they were bad so none of that could be it.

thanks
Nick