Key Features:

• GM Small Block (V8) 305-350 cu.in. (1979-1989) (Starboard)
• V-8 Starboard Side

Use With:

• 18-2949: Exhaust Manifold Gasket
• 18-8502: Exhaust Manifold Mounting Kit
• 18-1921: Manifold Elbow
• 18-2902-1: Exhaust Manifold Gasket
• 18-2902-1-9: Exhaust Manifold Gasket (Priced Per Pkg of 2)

Interchanges/Replaces

Barr

• OMC-1-912441

GLM

• 51410

Mallory

• 9-40602

OMC Stern Drive

• 912441

Osco

• 2441

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-0943-2	Barr OMC 47 909786 GLM 33810 Mallory 9-61452 OMC Inboard 909786 OMC Stern Drive 351325 3850496 909786 913783 Osco 9863-G Volvo Penta 3850496 3863191	1	Exhaust Elbow Gasket		N/A
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
18-710-20-2	Mercruiser Stern Drive 54-32780 54-32880 54-815504220	1	Hose Clamp-13/16 TO 1-3/4		N/A
18-0550	GLM 22280 Mallory 9-42721 OMC Inboard 909830 OMC Stern Drive 764799 909830	1	Plug Off Cap		N/A

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

Additional Details:

• Fits: MCM/MIE GM V-8 (283, 305, 350 & 377 cid) engines

Use With:

• 18-1902: Manifold
• 18-1903: Manifold
• 18-1925: Manifold
• 18-1926: Manifold
• 18-1931-1: Manifold
• 18-1951-1: Manifold
• 18-1986-1: Manifold
• 18-1997-1: Manifold
• 18-1950-1: Manifold
• 18-1953-2: Manifold
• 18-8502: Exhaust Manifold Mounting Kit

Interchanges/Replaces

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

Additional Details:

• For: Volvo 5.0L, GL, GXI, OSI, and 5.7L, GL, GI, GXI, GIL, GXIL, OSI, OSXI

Use With:

• 18-1997-1: Manifold
• 18-1986-1: Manifold
• 18-1902: Manifold
• 18-1903: Manifold

Interchanges/Replaces

Barr

• CHV470000
• OMC-47-909314

GLM

• 31101

OMC Inboard

• 909314

OMC Stern Drive

• 3852468
• 909314

Osco

• CV-GH

Volvo Penta

• 3852468