GM Big Block Exhaust Manifold Gasket Set | Sierra 18-4348 Boat Gears & Gear Sets Don’t leave the dock without

Don’t leave the dock without spare blades for fast repairs and to stay safe on the water

1L Owners Manual

Contains PTEF protective polymer barrier coating

Replaces Sierra 18-3047

Flange Split Coupling

GM Big Block Exhaust Manifold Gasket Set | Sierra 18-4348 Boat Gears & Gear Sets Don’t leave the dock withoutGasket kit includes 2 manifold to head gaskets & 2 center rise elbow restrictor gaskets for a pair of Mercruiser 7. 4L & 8. 2L center rise exhaust manifolds. GM Big Block Exhaust Manifold Gasket Set Sierra 18 4348 Mercruiser exhaust manifold gasket set For GM 454 and 502 cu. in. marine engines with Mercruiser center rise elbows risers Includes 2 manifold gaskets P N 18 0418 and 2 riser gaskets P N 18 0897