Sierra / Mallory

Key Features:

• Supplied with Mounting Package

Additional Details:

• Fits: Most Mercruiser (GM) in-line 6 cyl. engines

Use With:

• 18-8531: Exhaust Manifold Mounting Kit
• 18-0353: Carburetor Mounting Gasket
• 18-1971: Elbow
• 18-1972: Elbow
• 18-1978: Elbow
• 18-4009: Manifold End Plate
• 18-2830-1: Exhaust Manifold Gasket
• 18-2832-1: Manifold End Cap Gasket

Interchanges/Replaces

Barr

• MC 1 58759

GLM

• 51224

HGE

• 8759

Mallory

• 9-40500

Mercruiser Stern Drive

• 52073A1
• 52969A1
• 58759A1
• 58759A10
• 58759A13
• 58759A14

Osco

• 8759

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
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
18-4256	Mallory 9-40545	1	Pipe Plug		N/A
18-2830-1	Barr MC47-27-46401 GLM 31440 Mallory 9-61416 Mercruiser Stern Drive 27-33121 27-46401 27-52584 879036 OMC Stern Drive 907932 Osco CY6-GH	1	Exhaust Manifold 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
18-0928-1	Barr MC472773814 GLM 30920 Mercruiser Stern Drive 27-73814 27-738141 27-807218	1	Gasket, Manifold End Cap		N/A
18-2832-1	Barr MC47-27-48043 GLM 31490 Mallory 9-61424 Mercruiser Stern Drive 27-48043 27-480431 Osco 48043	1	Manifold End Cap Gasket		N/A

Key Features:

• Starboard

Additional Details:

• For: Crusader GM Big Block V8 454cu.in (Models CH350 & 454XL)

Use With:

• 18-0418: Exhaust Manifold Mounting Gasket
• 18-8524: Exhaust Manifold Mounting Kit
• 18-0601: Exhaust Manifold Gasket Set
• 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-1-97992

Crusader

• 97114
• 97992

Mallory

• 9-40416

Osco

• 7992

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:

• Supplied with mounting package
• Port Side

Additional Details:

• Fits: MCM/MIE Ford V-8 engines (1977 & older)

Use With:

• 18-1906: Manifold Spacer
• 18-1971: Elbow
• 18-1978: Elbow
• 18-4008: Block Off Plate
• 18-4009: Manifold End Plate
• 18-0897: Exhaust Elbow Gasket
• 18-2849-1: Exhaust Elbow Gasket
• 18-0183-1: Exhaust Manifold Gasket
• 18-2832-1: Manifold End Cap Gasket

Interchanges/Replaces

Barr

• MC-1-65604

GLM

• 51250

Mallory

• 9-40502

Mercruiser Stern Drive

• 54100A1
• 54100A5
• 65604A12
• 65604A4

Osco

• 5604

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
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
18-0183-1	Barr FM 47 0000 MC47-27-73866 GLM 33790 Mallory 9-61420 Mercruiser Stern Drive 27-54566 27-73866 OMC Stern Drive 3852455 3853742 908717 916262 Osco FL-GH Pleasurecraft RM0007 Volvo Penta 3852455 3853742	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

Key Features:

• Supplied with mounting package
• Port & Starboard

Additional Details:

• Fits: MCM GM V-6 (229 & 262 cid) engines (1985-2002)

Use With:

• 18-2909: Exhaust Manifold Gasket
• 18-8533: Exhaust Manifold Mounting Kit
• 18-1908: Manifold Riser Spacer
• 18-1908K: Manifold Riser Spacer Kit
• 18-1985: Manifold Spacer
• 18-2849-1: Exhaust Elbow Gasket
• 18-2909-9: Exhaust Manifold Gasket (Priced Per Pkg of 2)
• 18-8554: Exhaust Elbow Mounting Kit
• 18-8555: Exhaust Elbow Mounting Kit
• 18-8556: Exhaust Elbow Mounting Kit
• 18-0672: Exhaust Elbow Gasket
• 18-0897: Exhaust Elbow Gasket
• 18-1970-2: Riser Elbow
• 18-1976-2: Manifold Elbow

Interchanges/Replaces

Barr

• MC-1-99746

GLM

• 51220

HGE

• 9746

Mallory

• 9-40505

Marine Power

• 611447

Mercruiser Stern Drive

• 99746A17
• 99746A3
• 99746A8

Osco

• 9745

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
18-2909	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
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

Key Features:

• Will fit either Port or Starboard
• Ideally suited for freshwater applications

Use With:

• 18-0418: Exhaust Manifold Mounting Gasket
• 18-8532: Exhaust Manifold Mounting Kit
• 18-0672: Exhaust Elbow Gasket
• 18-0897: Exhaust Elbow Gasket
• 18-1908: Manifold Riser Spacer
• 18-1970-2: Riser Elbow
• 18-1974-1: Elbow
• 18-1976-2: Manifold Elbow
• 18-1985: Manifold Spacer
• 18-2849-1: Exhaust Elbow Gasket
• 18-8554: Exhaust Elbow Mounting Kit
• 18-8555: Exhaust Elbow Mounting Kit

Interchanges/Replaces

Barr

• MC-1-89011

GLM

• 51240

HGE

• 9011

Mallory

• 9-40506

Marine Power

• 0991-1000

Mercruiser Stern Drive

• 807078Q07
• 807078T08

Osco

• 9011

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
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
18-0418	Barr CHVA470000 MC47-27-46820 Crusader 96653 GLM 33760 Mallory 9-61400 Mercruiser Stern Drive 27-46820 OMC Inboard 909613 OMC Stern Drive 3852472 909613 Osco CW-GH Volvo Penta 3852472	1	Exhaust Manifold Mounting Gasket		N/A
18-4224	GLM 13990 Mallory 9-41200 Mercruiser Stern Drive 22-806926A1 22-862210A01	1	Drain Elbow Assembly		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

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:

• GM Small Block (V8) 305-350 cu. in.
• Port & Starboard

Additional Details:

• Material: CAST IRON

Use With:

• 18-2949: Exhaust Manifold Gasket
• 18-8502: Exhaust Manifold Mounting Kit
• 18-1909-1: Riser
• 18-2949-9: Exhaust Manifold Gasket (Priced Per Pkg of 2)
• 18-2902-1: Exhaust Manifold Gasket
• 18-2902-1-9: Exhaust Manifold Gasket (Priced Per Pkg of 2)

Interchanges/Replaces

Barr

• OMC 1 914035

GLM

• 51430

HGE

• 4035

Mallory

• 9-40902

OMC Stern Drive

• 3852374
• 3857579
• 3857723
• 914035

Osco

• 57579

Volvo Penta

• 3847501
• 3852374
• 3857723

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-710-16-2		1	Hose Clamp-11/16 TO 1-1/2		N/A
NSS	Volvo Penta 21238201	1	Adaptor, Manifold	No Image	N/A
NSS	Volvo Penta 3852538	1	Brass Elbow	No Image	N/A

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 & Starboard

Additional Details:

• Type: Universal Center Riser Manifold
• Fits: Ford 302 and 351 CID Engines

Use With:

• 18-0603: Exhaust Manifold Gasket Set
• 18-8538: Exhaust Manifold Mounting Kit
• 18-1907: Riser
• 18-1939: Riser
• 18-1949: Manifold Spacer
• 18-1999: Manifold Elbow
• 18-4363: Exhaust Elbow Mounting Package
• 18-8112: Hose Fitting 90°
• 18-0183-1: Exhaust Manifold Gasket

Interchanges/Replaces

Barr

• FM-1-83

GLM

• 56250

HGE

• 1-81

Mallory

• 9-40111

Osco

• FL994
• FLCR818

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
18-0183-1	Barr FM 47 0000 MC47-27-73866 GLM 33790 Mallory 9-61420 Mercruiser Stern Drive 27-54566 27-73866 OMC Stern Drive 3852455 3853742 908717 916262 Osco FL-GH Pleasurecraft RM0007 Volvo Penta 3852455 3853742	1	Exhaust Manifold Gasket		N/A
18-4258	Crusader 113186 GLM 21892 Mallory 9-41205 Mercruiser Stern Drive 22-33198 22-33198A1 22-41622 22-46754 Osco 1016012	2	Pipe Plug		N/A

Key Features:

• Comes with 18-0897, 18-4203 & 18-4258
• Recommended for saltwater applications

Additional Details:

• Fits: MCM/MIE GM V-6 & V-8 with center rise outlet exhaust manifold (2002 & older)

Use With:

• 18-0672: Exhaust Elbow Gasket
• 18-0897: Exhaust Elbow Gasket
• 18-1952-1: Manifold
• 18-1953-2: Manifold
• 18-2849-1: Exhaust Elbow Gasket
• 18-1957-2: Manifold
• 18-8505: Exhaust Elbow Mounting Kit

Interchanges/Replaces

Barr

• MC-20-44354

GLM

• 51140

HGE

• 4354

Mallory

• 9-40559

Mercruiser Stern Drive

• 44354A10
• 44354A13
• 44354A3
• 44354A9
• 807914A1
• 807988A03
• 807988A2

Osco

• 4354

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
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
18-8410	Mercruiser Stern Drive 10-43749	4	Riser Bolt		N/A

Interchanges/Replaces

Barr

• OMC47908935

GLM

• 32980

OMC Stern Drive

• 908935

Interchanges/Replaces

Barr

• OMC47311131

OMC Stern Drive

• 311131

Additional Details:

• Fits: MCM/MIE 120/2.5L, 140/3.0L, 165 (I/L 6 cyl.), 470, 898, 228 & 260

Interchanges/Replaces

Barr

• MC472773814

GLM

• 30920

Mercruiser Stern Drive

• 27-73814
• 27-738141
• 27-807218

Interchanges/Replaces

Barr

• OMC47908935

GLM

• 32980

OMC Stern Drive

• 908935

Interchanges/Replaces

OMC Stern Drive

• 311131

Interchanges/Replaces

Barr

• OMC47311130

GLM

• 33340

OMC Stern Drive

• 311130

Use With:

• 18-1901: Manifold

Interchanges/Replaces

Barr

• OMC47311121

GLM

• 33330

OMC Stern Drive

• 311121