Key Features:

• Supplied with Mounting Package

Additional Details:

• Material: CAST IRON
• For: Port & Starboard

Use With:

• 18-2949: Exhaust Manifold Gasket
• 18-8511: Exhaust Manifold Mounting Kit
• 18-1935-1: Riser
• 18-2949-9: Exhaust Manifold Gasket (Priced Per Pkg of 2)
• 18-2971: Exhaust Manifold Gasket
• 18-8502: Exhaust Manifold Mounting Kit

Interchanges/Replaces

Barr

• VO-1-835804

GLM

• 51630

HGE

• 5804

Mallory

• 9-40901

Osco

• 5805

Volvo Penta

• 835804
• 856883

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
18-2971-1	Barr VO47-835908 GLM 35080 Mallory 9-65800 Osco 35908 Volvo Penta 835908 856039 857618	1	Exhaust Manifold Gasket		N/A

Key Features:

• Volvo GM Small Block V8 305-350 cu.in.

Additional Details:

• Models: AQ & BB200, 205, 211, 231, 225, 260, 271, 290, 311, 500, 501, 570, 571 & 572

Use With:

• 18-1935-1: Riser

Interchanges/Replaces

Mallory

• 9-40972

Osco

• 56879-MK

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
NSS	Volvo Penta 959796	2	Bolt, Zinc 5/16-18 x 5 1/2 Grade	No Image	N/A
18-4236	GLM 21725 Volvo Penta 941907	4	Washer
18-2971-1	Barr VO47-835908 GLM 35080 Mallory 9-65800 Osco 35908 Volvo Penta 835908 856039 857618	1	Exhaust Manifold Gasket		N/A

Additional Details:

• Material: CAST IRON
• For: Port & Starboard

Use With:

• 18-2909: Exhaust Manifold Gasket
• 18-1936: Riser
• 18-2909-9: Exhaust Manifold Gasket (Priced Per Pkg of 2)
• 18-2971: Exhaust Manifold Gasket

Interchanges/Replaces

GLM

• 51640

HGE

• 6894

Volvo Penta

• 856894

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2971-1	Barr VO47-835908 GLM 35080 Mallory 9-65800 Osco 35908 Volvo Penta 835908 856039 857618	1	Exhaust Manifold Gasket		N/A
18-2909	Barr MC47-27-99757 Crusader 97498 GLM 32170 Mallory 9-61421 Mercruiser Stern Drive 27-99757 OMC Stern Drive 3853412 910157 915025 Osco CS-GH Volvo Penta 3853412 856116 Yamaha Sterndrive YSC-12190-00-AC	1	Exhaust Manifold Gasket		N/A