Complete Mercruiser V-8 GM 454/502 manifold Set with 4 inch risers and 6 inch spacer

Model: GLM-58246

Replacement for 454 Chevy Mercruiser Exhaust Manifold Sets with 4 inchriser and 6 inch spacer

Big Block Manifold Sets with 3 inch Risers - without Spacer

For Mercruiser GM V8 454 Big Block Raw/Fresh Water Cooling System

Set includes two Manifold, two 4 inch Risers, two 6 inch Spacers, Studs and Gaskets