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87 Formula Exhaust Flappers

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Old 07-30-2018 | 07:45 PM
  #1  
NHGuy
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From: Lake Winnipesaukee, NH
Default 87 Formula Exhaust Flappers
Does my boat us a standard size flapper? Any one know what I should order?
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Old 07-31-2018 | 06:18 PM
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Bondo
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Ayuh,..... They'll be in the top of the y-pipe,....

Which ones depends on which y-pipe ya got, 3" round, 4" round, or 4" oval,.....
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Old 07-31-2018 | 07:29 PM
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NHGuy
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I'll just take a look, It has 4" rubber hoses that go from the risers to the though hull outlets. They are probably 3 1/2 or thereabouts on the inside.
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Old 08-01-2018 | 06:14 PM
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dereknkathy
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No thru-prop? External Salisbury flappers? 4 inch...
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