Sierra Manifold Riser Spacer

Mercruiser: 93320
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,
18-1957-2