Replaces OEM part # For:
Mercuriser 229 and 262 V6, 305-350 Small Block V8, 454 Big Block V
6" Spacer for Manifold: 18-1952-1, 18-1957-1, 18-1953-1
Use with Mounting Kit 18-8556 (To mount elbows to spacer a seperate mounting kit is required)
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