{"product_id":"sierra-18-4457-exhaust-flapper-4-inch","title":"Sierra Premium 18-4457 Exhaust Flapper – 4 Inch","description":"\u003cp data-start=\"184\" data-end=\"533\"\u003eThis 4\" Sierra Premium 18-4457 exhaust flapper is designed to protect your marine engine from backflow damage. It features a durable stainless steel hose clamp and a weather-resistant rubber flapper valve for long-lasting performance. This model replaces MerCruiser 12644A and is also listed as alternate part numbers SIE 4457, 18-4457, and 47-4457.\u003c\/p\u003e","brand":"Sierra Premium","offers":[{"title":"Default Title","offer_id":45428698284210,"sku":"SIE-18-4457","price":54.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3028\/8562\/files\/4457__44542.1718902345.jpg?v=1747331158","url":"https:\/\/www.harbourchandler.ca\/products\/sierra-18-4457-exhaust-flapper-4-inch","provider":"The Harbour Chandler","version":"1.0","type":"link"}