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Came with the HS4 I purchased a while back. Anyone know the original application? It's an adapter for an air filter for an HS4, but no idea which year, make or model....
Some Rover engines used that to connect a top loaded air filter (or hose)to the side of the carb....HS-6's on V8 Rovers had the same thing...I think the stud in the middle was for holding the filter assembly to it.
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