3IN BLK EXHAUST THRU-HULL W/FLAPPER
Thru-Hull Exhaust Fittings with Flapper
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Thru-Hull Exhaust Fittings with Flapper - Black

Helps Protect Engine From Reverse Water Flow in Exhaust System
By: Centek

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Overview
Thru-hull fittings with flaps are designed to impede water backflow into the exhaust system and engine when stopped, moving slowly or backing down. Reverse water flow can cause severe damage if it enters the engine.
• Made from flame retardant, fiberglass re-inforced resin
• Flapper Repair Kits include: black rubber flapper, 2 screws, and a small flange plate for under the screw heads
 
 
 
 
 
 
 

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