3" Internal Butterfly Style Rubber Replacement Exhaust Flapper

These original equipment style rubber flaps are designed to replace missing or burned out flaps. They can also be easily retro-fitted to tips that were not originally equipped with flaps. This flap tack welds in place on a stainless steel tip.
Note: Flaps are recommended in all wet exhaust systems. Sold each.

3-1/2" Internal Butterfly Style Rubber Replacement Exhaust Flapper

These original equipment style rubber flaps are designed to replace missing or burned out flaps. They can also be easily retro-fitted to tips that were not originally equipped with flaps. Note: Flaps are recommended in all wet exhaust systems. Sold each.

Disclaimer: Our internal flaps are designed and rated for applications up to 500 horsepower (HP). Operation beyond this limit may result in flap failure or complete flap loss. For engines exceeding 500 HP external flaps must be used.

4" Internal Butterfly Style Rubber Replacement Exhaust Flapper

These original equipment style rubber flaps are designed to replace missing or burned out flaps. They can also be easily retro-fitted to tips that were not originally equipped with flaps. Note: Flaps are recommended in all wet exhaust systems. Sold each.

Disclaimer: Our internal flaps are designed and rated for applications up to 500 horsepower (HP). Operation beyond this limit may result in flap failure or complete flap loss. For engines exceeding 500 HP external flaps must be used.

4-1/2" Stainless Steel Exhaust Flappers (pair)

If you're like us and can't stand the ugly sight of those black rubber Salisbury style flappers then feast your eyes on this piece.  Hardin Marine has handcrafted these beautifully polished stainless steel exhaust flappers to eliminate that eyesore.  The flappers feature and O-ring seal to eliminate the possibility of any noise from the flapper during normal operation.  This new flapper represents the ultimate finishing touch to your boats exhaust system.  Available in 4", 4-1/2" or 5" sizes.

5" Stainless Steel Exhaust Flappers (pair)

If you're like us and can't stand the ugly sight of those black rubber Salisbury style flappers then feast your eyes on this piece.  Hardin Marine has handcrafted these beautifully polished stainless steel exhaust flappers to eliminate that eyesore.  The flappers feature and O-ring seal to eliminate the possibility of any noise from the flapper during normal operation.  This new flapper represents the ultimate finishing touch to your boats exhaust system.  Available in 4", 4-1/2" or 5" sizes.

4" Silent Seal Replacement Flapper

This flapper is manufactured from a high temperature, burn resistant special rubber compound.  This is the same flapper used in part number 410-280179 Silent Seal flapper Assembly.

4" Silent Seal Easy Service Exhaust Flapper Assembly (Each)

At last an answer to eliminating the annoying clanking and banging caused by old design stainless anti-burn exhaust flaps. It seems the many complaints of knocking engine noises and fears caused by the sounds of anti-burn flaps have created the demand to develop and cure this problem once and for all. The all new "Silent Seal" exhaust flap with its special high temp burn resistant rubber compounded exhaust flap and stainless steel cage design provide the perfect answer. This new flap design provides a superior seal and quiet operation. These flaps can easily be retrofitted to earlier style tips with just minor brazing or welding of the flap cage to your exhaust tip. Flap is 3.850" OD with 1" center to center bolt mounting holes.

2-1/2" to 3" I.D. External Salisbury Flapper

These are excellent American-made flaps that will not curl like cheap import copies. These are a must for boats with a very close distance between exhaust ports and the water line Clamp is included. This flap has a 3" ID and must be cut down for 2-1/2" applications. Sold each.

3-1/2" to 4" I.D. External Salisbury Flapper

These are excellent American-made flaps that will not curl like cheap import copies. These are a must for boats with a very close distance between exhaust ports and the water line Clamp is included. This flap has a 4" ID and must be cut down for 3-1/2" applications. Sold each.

4-1/2" I.D. External Salisbury Flapper

These are excellent American-made flaps that will not curl like cheap import copies. These are a must for boats with a very close distance between exhaust ports and the water line Clamp is included.  Sold each.