Key Features:

• Port & Starboard

Additional Details:

• Material: Cast Iron
• Type: Universal center riser manifold
• Fits: Crusader GM 283 & 327 CID Engines thru 1964
• Fits: Crusader GM 305, 307, & 350 CID Engines 1965 and later
• Fits: Chris-Craft 283, 302, 307 & 350 CID Engines
• Fits: Mercruiser GM 283, 305, 307, 350 CID Engines
• Fits: OMC 283, 305, 307 & 350 CID engines 1968-1980
• Fits: Volvo 307 & 350 CID engines
• Fits: Pleasurecraft GM 283, 305, 307 & 350 CID Engines

Use With:

• 18-0604: Exhaust Manifold Gasket Set
• 18-2949: Exhaust Manifold Gasket
• 18-8536: Exhaust Elbow Mounting Kit
• 18-1907: Riser
• 18-1939: Riser
• 18-1949: Manifold Spacer
• 18-1999: Manifold Elbow
• 18-8112: Hose Fitting 90°
• 18-2902-1: Exhaust Manifold Gasket

Interchanges/Replaces

Barr

• CHV-1-83

GLM

• 56230

HGE

• 1-83

Mallory

• 9-40110

Osco

• 994

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2854-1	Barr 01-0107 GLM 36830 Mallory 9-65501 Osco 992-G	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

Key Features:

• Port

Additional Details:

• For: Crusader GM Small Block V8 305-350cu.in. (Models 220 & 270)

Use With:

• 18-2949: Exhaust Manifold Gasket
• 18-8521: Exhaust Manifold Mounting Kit
• 18-1916: Riser
• 18-1918: Elbow
• 18-1927: Riser
• 18-1928: Elbow w/ 4" Outlet
• 18-1934: Elbow w/ 3" Outlet
• 18-8112: Hose Fitting 90°
• 18-0305-1: Exhaust Elbow Gasket

Interchanges/Replaces

Barr

• CR-1-97753

Crusader

• 96121
• 97753

Mallory

• 9-40400

Osco

• 7753

Additional Details:

• For: Crusader GM Small Block V8 305, 350 cu. in.

Use With:

• 18-1925: Manifold
• 18-1926: Manifold

Interchanges/Replaces

Mallory

• 9-40471

Osco

• 775-MK
• 775-MK-A

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

Key Features:

• Supplied with mounting package
• Port Side

Additional Details:

• Fits: MCM/MIE GM V-8 (305 & 350 cid) engines (1977-1982)

Use With:

• 18-2949: Exhaust Manifold Gasket
• 18-8548: Hardware Kit [Manifold Bolts]
• 18-1971: Elbow
• 18-1978: Elbow
• 18-4008: Block Off Plate
• 18-4009: Manifold End Plate
• 18-8520: Exhaust Manifold Mounting Kit
• 18-2832-1: Manifold End Cap Gasket

Interchanges/Replaces

Barr

• MC-1-77234

GLM

• 51237

HGE

• 7234

Mallory

• 9-40503

Mercruiser Stern Drive

• 77234A2
• 77234A7

Osco

• 7234B

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
18-4263	Chrysler/Force/US Marine 22-328021 22-328022 F700633 FI5810151 GLM 21893 Mercruiser Stern Drive 22-32802 22-328021 22-328022 22-841908 Mercury Marine 22-30139 22-32802 22-328021 22-328022	1	Pipe Plug		N/A
18-2833	Barr MC472799777 GLM 31520 Mallory 9-61407 Mercruiser Stern Drive 27-52076 27-99777 27-997771 27-997772 27-99777B2 Osco 52076	1	Exhaust Elbow Gasket		N/A
18-2832-1	Barr MC47-27-48043 GLM 31490 Mallory 9-61424 Mercruiser Stern Drive 27-48043 27-480431 Osco 48043	2	Manifold End Cap Gasket		N/A

Key Features:

• Starboard Side
• Supplied with Mounting Package

Additional Details:

• Fits: MCM/MIE GM V-8 (305 & 350 cid) engines (1977-1982)

Use With:

• 18-2949: Exhaust Manifold Gasket
• 18-8548: Hardware Kit [Manifold Bolts]
• 18-1971: Elbow
• 18-1978: Elbow
• 18-4008: Block Off Plate
• 18-4009: Manifold End Plate
• 18-8520: Exhaust Manifold Mounting Kit
• 18-8554: Exhaust Elbow Mounting Kit
• 18-8556: Exhaust Elbow Mounting Kit
• 18-2832-1: Manifold End Cap Gasket
• 18-2832-1-9: Manifold End Cap Gasket (Priced Per Pkg of 2)

Interchanges/Replaces

Barr

• MC-1-77235

GLM

• 51238

HGE

• 7235

Mallory

• 9-40504

Mercruiser Stern Drive

• 77235A2
• 77235A8

Osco

• 7235B

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
18-2832-1	Barr MC47-27-48043 GLM 31490 Mallory 9-61424 Mercruiser Stern Drive 27-48043 27-480431 Osco 48043	2	Manifold End Cap Gasket		N/A
18-2833	Barr MC472799777 GLM 31520 Mallory 9-61407 Mercruiser Stern Drive 27-52076 27-99777 27-997771 27-997772 27-99777B2 Osco 52076	1	Exhaust Elbow Gasket		N/A
18-4263	Chrysler/Force/US Marine 22-328021 22-328022 F700633 FI5810151 GLM 21893 Mercruiser Stern Drive 22-32802 22-328021 22-328022 22-841908 Mercury Marine 22-30139 22-32802 22-328021 22-328022	1	Pipe Plug		N/A

Key Features:

• Supplied with gaskets
• Will fit port and starboard
• Ideally suited for freshwater applications

Additional Details:

• Fits: MCM/MIE GM V-8 (305, 350 & 377 cid) engines (1983-2002)

Use With:

• 18-8520: Exhaust Manifold Mounting Kit
• 18-1908: Manifold Riser Spacer
• 18-1985: Manifold Spacer
• 18-8554: Exhaust Elbow Mounting Kit
• 18-8555: Exhaust Elbow Mounting Kit
• 18-8556: Exhaust Elbow Mounting Kit
• 18-0672: Exhaust Elbow Gasket
• 18-1974-1: Elbow
• 18-0897: Exhaust Elbow Gasket
• 18-2849-1: Exhaust Elbow Gasket
• 18-2949: Exhaust Manifold Gasket
• 18-2949-9: Exhaust Manifold Gasket (Priced Per Pkg of 2)
• 18-1970-2: Riser Elbow
• 18-1976-2: Manifold Elbow

Interchanges/Replaces

Barr

• MC-1-87114

GLM

• 51230

HGE

• 7114

Mallory

• 9-40507

Marine Power

• 0994-100

Mercruiser Stern Drive

• 860246Q11

Osco

• 7114B2

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-4224	GLM 13990 Mallory 9-41200 Mercruiser Stern Drive 22-806926A1 22-862210A01	1	Drain Elbow Assembly		N/A
18-0897	Barr MC 20 99208 MC47-27-41813 GLM 30240 Mallory 9-61413 Mercruiser Stern Drive 27-41813 27-860233 27-863724 Osco 8503-GR	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

Additional Details:

• For: Mercruiser GM Small Block V-8 305-350 cu. in. (models 198, 200, 228, 230, 260 & 898)

Use With:

• 18-1950-1: Manifold
• 18-1951-1: Manifold
• 18-1953-2: Manifold

Interchanges/Replaces

Mallory

• 9-40573

Osco

• 7214-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
NSS	Mercruiser Stern Drive 10-52143	4	Screw	No Image	N/A

Key Features:

• GM Small Block (V8) 305-350 cu. in. (1979-1989) (Port)

Additional Details:

• For: Port Side

Use With:

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

Interchanges/Replaces

Barr

• OMC-1-912442

GLM

• 51420

Mallory

• 9-40601

OMC Stern Drive

• 912442

Osco

• 2442

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
18-0550	GLM 22280 Mallory 9-42721 OMC Inboard 909830 OMC Stern Drive 764799 909830	1	Plug Off Cap		N/A
18-7306	Volvo Penta 22274884 853548	1	Hose Clamp		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

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

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