{"product_id":"uanofcn-807166a1-water-shutter-exhaust-flapper-pair-for-mercruiser-stern-drive-v6-v8-175-370-engines","title":"UANOFCN 807166A1 Water Shutter Exhaust Flapper Pair for MerCruiser Stern Drive V6\/V8 175-370 Engines","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eUpgrade your MerCruiser exhaust system with the UANOFCN 807166A1 water shutter pair. This kit includes two sturdy exhaust shutter flappers and four grommets, crafted to fit a range of stern-drive configurations and to stand up to marine conditions. The design emphasizes a secure seal, smooth operation, and durable materials that hold up under regular boating use.\u003c\/p\u003e\n\n\u003ch3\u003eFitment at a glance\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eTwo exhaust shutter flappers with four accompanying grommets for secure mounting and a reliable seal.\u003c\/li\u003e\n  \u003cli\u003e3-inch water shutter compatible with MerCruiser 807166A1 and GLM 89175 for straightforward pairing when needed.\u003c\/li\u003e\n  \u003cli\u003eBroad engine compatibility: MerCruiser V6 and V8 with 4\" Y-Pipe setups from 1992–2001, plus DRY JOINT configurations (7° in 2002–2004 and 14° in 2005–2010) and various WET JOINT configurations (GM 229\/262 CID; GM 305\/350\/377 CID; GM 454\/502 CID).\u003c\/li\u003e\n  \u003cli\u003eImportant compatibility notes: not suitable for V6 engines with one-piece manifolds; not for early V8 models using a round-pin flapper.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMaterials and durability\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eConstructed from premium metal and rubber to balance hardness, flexibility, and long-term resilience.\u003c\/li\u003e\n  \u003cli\u003eOEM-quality construction designed to match original-part performance and fit in compatible systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat to expect on the water\u003c\/h3\u003e\n\u003cp\u003eWhen installed in a compatible setup, these shutters support the intended exhaust routing and can contribute to steadier operation across throttle ranges. The included grommets help reduce vibration and wear, while the durable materials aim to resist corrosion from marine environments. Think of this kit as a practical upgrade for boats that rely on MerCruiser stern-drive configurations in V6 or V8 applications.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation notes and tips\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify that your engine and exhaust manifold configuration align with the listed DRY and WET joint specs before installation.\u003c\/li\u003e\n  \u003cli\u003eDouble-check compatibility regarding manifolds and pin styles to ensure a correct match.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eChoosing UANOFCN means selecting a component designed to align with OEM standards and to function as a thoughtful replacement in supported MerCruiser setups. Consider this pair if you’re seeking a practical, robust update that mirrors original-part intent without making guarantees about performance enhancements.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What engines and configurations does the UANOFCN 807166A1 pair fit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Designed for MerCruiser stern drives with V6\/V8 engines, 4\" Y-Pipe setups, and specified DRY\/WET joint configurations; consult notes for engine-specific limitations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What makes these shutters durable for marine use?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Premium metal and rubber construction with OEM-quality design, built to withstand regular boating conditions while maintaining a reliable fit.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"UANOFCN","offers":[{"title":"Default Title","offer_id":42470118129749,"sku":"B079KBNV5C","price":43.22,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/3270\/4597\/files\/uano-fcn-807166a1-pair-water-shutter-exhaust-flappers.jpg?v=1778119350","url":"https:\/\/plentytorque.co.uk\/products\/uanofcn-807166a1-water-shutter-exhaust-flapper-pair-for-mercruiser-stern-drive-v6-v8-175-370-engines","provider":"PlentyTorque","version":"1.0","type":"link"}