Mercruiser GM V6 229 and 262cu.in. (Models 185 and 205), GM Small Block V8 305-350cu.in. (Models: 200, 228, 230, 260, 898), GM Big Block V8 454cu.in. (Models: 330, 340 and 7.4L)
Riser: 18-1970-1 and 18-1974-1
Includes 18-0897 elbow gasket
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