Sierra 18-8502 Exhaust Manifold Mounting Kit

Sierra Exhaust Manifold Mounting Kit.

OMC GM Small block V8 305-350 cu. in. (1979-89)

OMC/Volvo GM Small Block 305-350 cu. in.

In the box

• 18-2949-9 Gasket, Exhaust Manifold
• 18-720-9 Stainless Steel Locknut

Use with

• 18-1986-1 Manifold 
• 18-1931-1 Manifold 
• 18-1903 Manifold- Port side 
• 18-1902 Manifold- Starboard Side 

Replaces Mallory

Replaces Osco