SIERRA MANIFOLD RISER SPACER (18-1908)

Mercruiser GM V6 229 and 262cu.in. (Models: 185 and 205),GM Small Block V8 305-350cu.in. (Models: 200, 228, 230, 260 and 898), GM Big Block V8 454cu.in. (Models: 330, 340 and 7.4L)
Used with:
Manifolds: 18-1952-1, 18-1953-2, 18-1957-1