New Exhaust Flappers Water Shutters Mercruiser 4.3 5.0 5.7 7.4 305 350 454 502

Description

New Replacement exhaust flappers for Mercruiser part number 807166A1
Used on many Mercruiser stern drive V6 and V8 engines.
They keep water from entering the engine through the exhaust and wear out or break overtime.
These do
NOT
fit V6 engines that came with the one piece manifolds (
They use 807166A2, note only one digit difference in the part number and do not interchange with the ones in this listing)
If your not sure these are the ones you need you can look up the part number on the Mercury website with your serial number
mercurymarine.com/en/us/parts-and-accessories/parts-catalog
This is for a set of two