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:

• 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

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

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

Key Features:

• Supplied with mounting package

Additional Details:

• Fits: MCM 140 (1982 & older)

Use With:

• 18-4009: Manifold End Plate
• 18-8549: Hardware Kit [Manifold Bolts]
• 18-1971: Elbow
• 18-1972: Elbow
• 18-1975-1: Riser With Exhaust Tube
• 18-1978: Elbow
• 18-5021: End Plate
• 18-1204-1: Exhaust Manifold Mounting Gasket
• 18-2832-1: Manifold End Cap Gasket

Interchanges/Replaces

Barr

• MC 1 96705

GLM

• 51212

Mercruiser Stern Drive

• 52390A1
• 96705A1

Osco

• 6705

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-4009	Barr 160252 GLM 51010 Mallory 9-40541 Mercruiser Stern Drive 52999 60252 60252A2 Osco 60252	1	Manifold End Plate		N/A
18-1990	Barr 1-73813 GLM 51030 Mercruiser Stern Drive 48045 54870 73813 73813A1 73813F1	1	Manifold Block Off Plate		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	1	Manifold End Cap Gasket		N/A
18-1204-1	Barr MC472796429 GLM 33570 Mallory 9-61419 Mercruiser Stern Drive 27-96429 OMC Stern Drive 912164 Osco MO4-GH	1	Exhaust Manifold Mounting 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
18-4257		1	Pipe Plug		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:

• Ford small block V8 302-351 cu.in.
• GM Big Block V8 454 cu.in.
• GM Small Block 305-350 cu.in

Additional Details:

• Size: 3"

Use With:

• 18-1898: Manifold
• 18-1997-1: Manifold
• 18-1998-1: Manifold
• 18-4258: Pipe Plug

Interchanges/Replaces

Barr

• CM 20-0097

GLM

• 56030

Mallory

• 9-40130

Osco

• 994-S3

Additional Details:

• Fits: Chrysler Model 273, 318, 340 & 360 CID engines (1966-1986)

Use With:

• 18-1940: Manifold
• 18-2941: End Cap Gasket (Open)
• 18-4360: Exhaust Elbow Mounting Package
• 18-4361: Exhaust Elbow Mounting Package (Open)
• 18-8506: Exhaust Elbow Mounting Kit
• 18-2941-9: End Cap Gasket (Priced Per Pkg of 2)
• 18-0472-1: Exhaust Elbow Gasket
• 18-1945: Riser

Interchanges/Replaces

Barr

• CM-20-6672

Chrysler Inboard

• 3527794

Mallory

• 9-40313

Osco

• 794

Additional Details:

• Degree: 90
• Size:: 1" NPT x 1 1/2" hose barb
• For: Crusader GM Small Block V8 305-350 cu.in. (Models 220, 270, CM305, CM350XL, CM350HT)
• For: Crusader GM Big Block V8 454 cu.in (Models; 454XL 502XL, CH350)

Use With:

• 18-1898: Manifold
• 18-1925: Manifold
• 18-1926: Manifold
• 18-1929: Manifold
• 18-1933: Manifold
• 18-1982: Manifold
• 18-1997-1: Manifold
• 18-1998-1: Manifold

Interchanges/Replaces

Crusader

• 97296
• 97854

GLM

• 13950

Mallory

• 9-40418

Osco

• 7854

Additional Details:

• Fits: MCM 898, 228, 250, 260 & Ford V-8 engines

Use With:

• 18-1950-1: Manifold
• 18-1951-1: Manifold
• 18-1958-1: Manifold
• 18-1962-1: Manifold
• 18-1971: Elbow
• 18-1978: Elbow

Interchanges/Replaces

Barr

• MC-20-60207

GLM

• 50006

Mallory

• 9-40540

Mercruiser Stern Drive

• 60207

Osco

• 60207

Use With:

• 18-1950-1: Manifold
• 18-1951-1: Manifold
• 18-1958-1: Manifold
• 18-1960-1: Manifold
• 18-1962-1: Manifold
• 18-8512: Exhaust Manifold Mounting Kit
• 18-1954-1: Manifold
• 18-1955-1: Manifold
• 18-1956-3: Manifold
• 18-2832-1: Manifold End Cap Gasket

Interchanges/Replaces

Barr

• 160252

GLM

• 51010

Mallory

• 9-40541

Mercruiser Stern Drive

• 52999
• 60252
• 60252A2

Osco

• 60252

Additional Details:

• Fits: Late model Mercruiser 4 cylinder engines
• Fits: MCM 2.5L & 3.0L/LX (1982 & newer)

Use With:

• 18-1901: Manifold
• 18-1954-1: Manifold
• 18-1955-1: Manifold
• 18-2748: Exhaust Boot
• 18-2833: Exhaust Elbow Gasket
• 18-8551: Hardware Kit [Exhaust Elbow Bolts]
• 18-2819-1: Exhaust Elbow Gasket
• 18-1956-3: Manifold

Interchanges/Replaces

Barr

• MC-20-12076

GLM

• 51160

Mallory

• 9-40555

Marine Power

• 6000-33A

Mercruiser Stern Drive

• 12076A1
• 12076A2
• 95864A2

Osco

• 2076

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2748	GLM 89120 Mallory 9-72805 Mercruiser Stern Drive 32-44348 32-44348001 32-44348T	1	Exhaust Boot		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
18-710-72-2	Mercruiser Stern Drive 54-31765 54-815504372	4	Hose Clamp-4-1/16 TO 5		N/A
18-8551	GLM 22445 Mallory 9-40585 Osco 2076-MK	1	Hardware Kit [Exhaust Elbow Bolts]