4" Exhaust Port Flap
ME8117
- In stock, ready to ship
- Inventory on the way
Product Description
Protect your boat’s exhaust system with our rugged and dependable 4" Boat Exhaust Port Flap, engineered for marine performance and built to last. Designed to deliver a tight seal and long-term durability, this port flap is molded from high-impact marine-grade nylon and designed specifically for 4-inch diameter exhaust ports, ensuring a snug fit and superior functionality.
Whether you're running offshore at high speed or docked during heavy rain, this port flap serves as a critical safeguard against water intrusion, corrosion, and engine backpressure. It’s a must-have for maintaining the health and efficiency of your inboard engine’s exhaust system.
Key Features & Benefits
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Marine-Grade Durability
Constructed from UV-stabilized, high-impact nylon, this flap resists cracking, corrosion, and deterioration in saltwater and freshwater environments. -
Precision Fit for 4-Inch Ports
Designed specifically for 4” boat exhaust outlets, delivering a tight, reliable seal that stays secure under all conditions. -
Water Intrusion Defense
Prevents backflow, spray, and splash ingress into your boat's exhaust system—protecting internal engine components and extending lifespan. -
Effortless Installation
Mounts easily using standard stainless steel screws or rivets. No special tools required—ideal for DIY marine repairs or upgrades. -
Sleek Low-Profile Design
Clean black finish and compact form provide a professional look that complements any hull design.
Product Specifications
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Product Name: 4" Boat Exhaust Port Flap
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Material: High-impact marine-grade nylon composite
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Color: Black (UV-resistant finish)
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Port Size Compatibility: Designed for 4-inch diameter boat exhaust ports
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Installation: Surface-mount with standard marine-grade fasteners (not included)
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Application: For inboard exhaust systems on powerboats, cruisers, yachts, and performance boats
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Function: Prevents backflow, water intrusion, and exhaust splashback