Manifold Riser Spacer, GM V6 & V8

Manifold Riser Spacer. 3”. For: Mercruiser GM V6 229 & 262cu.in (Models 185 & 205). For: Mercruiser GM Small block V8 305-350cu.in. (Models 200, 228, 230, 260 & 898). For: Mercruiser GM Big Block V8 454cu,in (Models 330, 340 & 7.4L). Meets or exceeds manufacturer's recommended specifications. Backed by Sierra's limited lifetime warranty. For: Mercruiser GM V6 229 & 262cu.in (Models 185 & 205) For: Mercruiser GM Small block V8 305-350cu.in. (Models 200, 228, 230, 260 & 898) For: Mercruiser GM Big Block V8 454cu,in (Models 330, 340 & 7.4L) Meets or exceeds manufacturer's recommended specifications Backed by Sierra's limited lifetime warranty