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Gibson MWA Oval Mufflers boast a 3cfm less flow than ordinary 3" straight mufflers. This feature allows the interior drone at the lowest and, at the same time, improving the peak performance of your ride. These mufflers also come in a straight-thru design, enhancing the flow of the exhaust gasses. Gibson fabricated their products in the USA for the best quality possible and their mufflers offer a stainless steel construction to outlast the competition. Get aggressive sound and the best value upgrade for your engine for less.