#78165 for 470 MC 3" diameter for inboard. MC only made a few hundred engines with this 3" unit, so make sure this is what you really need. For inboard/outboard applications order 77319 for 3", or 170 470 conversion kit for changing over from 3" to 4"
Manufacturer: Seakamp Engineering
MPN: 78165
SKU: 1138
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