For BMW 550i 11-15 Free Flow 304 SS Axle-Back Exhaust System w Quad Rear Exit oil-pans 4 L6 1961 - 1965

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For BMW 550i 11-15 Free Flow 304 SS Axle-Back Exhaust System w Quad Rear Exit oil-pans 4 L6 1961 - 1965Overview: Dinan's Free Flow Axle Back Exhaust improves exhaust flow by reducing back pressure, resulting in increased power output and a great sporty sound that is civilized when you want it to be and pleasantly aggressive under harder acceleration with zero drone. 100% stainless steel construction and exacting specifications ensure that the system fits correctly using the factory hangers and will resist corrosion for years to come. A vacuum