Exhaust Manifold Mounting Kit 

Key Features:

• OMC GM Small block V8 305-350 cu. in. (1979-89)
• OMC/Volvo GM Small Block 305-350 cu. in.

Use With:

• 18-1902: Manifold
• 18-1903: Manifold
• 18-1931-1: Manifold
• 18-1986-1: Manifold

Interchanges/Replaces

Mallory

• 9-40671

Osco

• 244-MK

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2949	Barr CHV-47-000 MC 47 27 33395 Crusader 96306 GLM 31100 Mercruiser Stern Drive 27-33395 27-33395B Osco CV-GH Volvo Penta 835966 856034	1	Exhaust Manifold Gasket		N/A
18-3720	GLM 21160 Mallory 9-72002 9-72002-10 Mercruiser Stern Drive 11-34932 11-82671013 Mercury Marine 11-34932 11-82671013	6	Stainless Steel Locknut