4″ Flapper Valves (Internal)
To view and download the PDF instruction sheet CLICK HERE
$39.00
4″ Exhaust flapper valve. The included brass bushing holds the flaps inside the tips to help reduce engine backwash.
(Sold Individually)
*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. Link to External Flaps: External Flap 4″ (Clamp On) (Pair)
IMCO offers a wide variety of polished, stainless steel exhaust tips. Mounting hardware not included. Custom tips are also available.