This riser is 10" tall. the volvo penta casting # on the side is 3889965 . it is 2" higher than the standard 8"riser.
this Replaces models with separate spacer blocks. in some applications you can use these to replace your 8" risers. you would need longer rubber hoses on your y-pipe. (probubally cheaper than 8" risers) most all newer v-8 mercruiser motors use this part. it is thought to be a upgrade to the 8" riser. WE ALSO HAVE THE Y-PIPES AND DOWNTURN ELBOWS IN OUR STORE.  THESE WERE PURCHASED FROM A MAJOR BOAT MANUFACTURER. SOME OF THESE HAVE BEEN INSTALLED FOR A SHORT TIME ON TESTING ENGINES USED IN FRESH WATER ONLY.  ALL ARE IN LIKE NEW CONDITION .

these may also fit other manifolds than those listed

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