Gibson Marine Bullet Muffler (Pair) - 4.5in Inlet/11in Length - StainlessGibson Bullet Marine Mufflers 4. 50 in. inlet, 11 in. overall. Tested up to 1200HP with minimal or no power loss. High quality, Stainless construction. OEM style transom mount. Straight through design. Utilizes water to dampen the sound. These silencers were specifically designed for Large displacement motors such as 500HP, 502, 525, 525SC, 575. and up to 1,200hp. Easy bolt on installation. The Gibson Marine Mufflers have proven to reduce decibel
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