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

Additional Details:

• Size: 3"
• For: Mercruiser GM V6 229 & 262cu.in (Models 185 & 205)
• For: Mercruiser GM Small block V8 305-350cu.in. (Models 200, 228, 230, 260 & 898)
• For: Mercruiser GM Big Block V8 454cu,in (Models 330, 340 & 7.4L)

Use With:

• 18-1952-1: Manifold
• 18-1953-2: Manifold
• 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
• 18-2849-1: Exhaust Elbow Gasket
• 18-1957-2: Manifold
• 18-1970-2: Riser Elbow
• 18-1976-2: Manifold Elbow

Interchanges/Replaces

Barr

• MC-20-93320A3

Mallory

• 9-40530

Mercruiser Stern Drive

• 93320

Osco

• 3320

Key Features:

• Comes with 18-0897 gasket and brass plugs

Additional Details:

• Fits: V-6 & V-8 applications 0° (3" O.D. Riser)

Use With:

• 18-0672: Exhaust Elbow Gasket
• 18-0897: Exhaust Elbow Gasket
• 18-2849-1: Exhaust Elbow Gasket
• 18-8529: Exhaust Elbow Mounting Kit
• 18-1953-2: Manifold
• 18-8554: Exhaust Elbow Mounting Kit
• 18-1957-2: Manifold

Interchanges/Replaces

Barr

• MC-20-98502

GLM

• 51192

Mallory

• 9-40554

Mercruiser Stern Drive

• 98502A2

Osco

• 8502

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

Additional Details:

• For: 229 & 262 ci V-6, 305 & 350 SB V-8, 454 Big Block V-8

Use With:

• 18-1906: Manifold Spacer
• 18-1908: Manifold Riser Spacer
• 18-1908K: Manifold Riser Spacer Kit
• 18-1951-1: Manifold
• 18-1952-1: Manifold
• 18-1953-2: Manifold
• 18-1971: Elbow
• 18-1978: Elbow
• 18-2849-1: Exhaust Elbow Gasket
• 18-1970-2: Riser Elbow
• 18-1957-2: Manifold

Interchanges/Replaces

GLM

• 53330

Mallory

• 9-40582

Osco

• 3320-MK
• 6371-MK-SP

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
18-2849-1	Barr MC 47 27 87105 GLM 32080 Mallory 9-61414 Mercruiser Stern Drive 27-818832 27-860232 27-863726 27-87105 27-871051 Osco 8503-GO	1	Exhaust Elbow Gasket		N/A

Additional Details:

• For: 229 & 262 ci V-6, 305 & 350 SB V-8, 454 Big Block V-8

Use With:

• 18-1908: Manifold Riser Spacer
• 18-1908K: Manifold Riser Spacer Kit
• 18-1952-1: Manifold
• 18-1953-2: Manifold
• 18-1957-2: Manifold
• 18-1976-2: Manifold Elbow

Interchanges/Replaces

GLM

• 53430

Mallory

• 9-40583

Osco

• 3320-MK-X

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
18-2849-1	Barr MC 47 27 87105 GLM 32080 Mallory 9-61414 Mercruiser Stern Drive 27-818832 27-860232 27-863726 27-87105 27-871051 Osco 8503-GO	1	Exhaust Elbow Gasket		N/A

Additional Details:

• For: GM 454 (7.4L) CID Eng
• Production Models: oval port

Interchanges/Replaces

GLM

• 39020

Mallory

• 9-61102

Mercruiser Stern Drive

• 27-801853

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-3877	Chris-Craft 16.50-00259 Crusader 30266 GLM 36110 Mallory 9-63701 Mercruiser Stern Drive 27-13218 27-13687 27-19315 27-49104 27-61224 27-8M0049045 27-97529 OMC Stern Drive 914849	2	Head Gasket
18-0464	GLM 30350 Mallory 9-61302 Mercruiser Stern Drive 27-49121 27-91831 OMC Stern Drive 912768	2	Valve Cover Gasket
18-2917	GLM 31560 GM 3701777 Mallory 9-60007 9-60007-10 Mercruiser Stern Drive 27-33179 27-53045 27-530451 27-53045B1 F10077105 FI1101276 FI1101291 FI5000096 OMC Inboard 3701777 OMC Stern Drive 3701777	1	Thermostat Gasket		N/A
18-2844	Barr MC472748818 GLM 31510 Mallory 9-60010 Mercruiser Stern Drive 27-48818 27-488181 27-48818Q01	1	Thermostat Gasket		N/A
18-0348	GLM 39490 Mallory 9-61501 Mercruiser Stern Drive 27-49107 27-52550 FI1100229 FI5000229 FI5000245 OMC Inboard 3931593	1	Oil Pan Gasket Set		N/A
18-0980	GLM 30440 Mercruiser Stern Drive 27-49109 27-54529 FI1100990 FI110990 OMC Inboard 3935449 OMC Stern Drive 3935449	1	Timing Cover Gasket		N/A
18-0903	GLM 31770 Mallory 9-60066 Mercruiser Stern Drive 27-49110 FI1101000 OMC Stern Drive 3853361 914874 Volvo Penta 3853361 856610 Yamaha Sterndrive YSG-38600-39-G0	2	Water Pump Gasket
18-0885-1	Barr MC472748042 GLM 31480 Mercruiser Stern Drive 27-48042	4	Exhaust Elbow Gasket
18-2832-1	Barr MC47-27-48043 GLM 31490 Mallory 9-61424 Mercruiser Stern Drive 27-48043 27-480431 Osco 48043	4	Manifold End Cap Gasket
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	2	Exhaust Manifold Mounting Gasket
18-4022	Mallory 9-61652 Mercruiser Stern Drive 26-49131 26-67863 26-75982 26-75988 F3866612 FI1100968 FI1101117	16	Valve Stem Seal
18-2848	GLM 30380 Mallory 9-61004 Mercruiser Stern Drive 27-52457 27-524571 27-524572	2	Carburetor Base Gasket
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	2	Exhaust Elbow Gasket
18-2849-1	Barr MC 47 27 87105 GLM 32080 Mallory 9-61414 Mercruiser Stern Drive 27-818832 27-860232 27-863726 27-87105 27-871051 Osco 8503-GO	4	Exhaust Elbow Gasket
18-2554	GLM 31630 Mallory 9-60006 Mercruiser Stern Drive 27-41812 27-41812B 27-41812Q 27-90556 Osco 41812	2	Thermostat Cover Gasket

Key Features:

• Packaged as a set, complete with mounting hardware
• 3" Riser Kit

Additional Details:

• Fits: MCM V-6 carb & TBI eng. w/ 2 piece exhaust manifolds (s/n 0M614999 & below)

Use With:

• 18-1952-1: Manifold
• 18-8554: Exhaust Elbow Mounting Kit
• 18-8555: Exhaust Elbow Mounting Kit
• 18-1953-2: Manifold
• 18-1957-2: Manifold

Interchanges/Replaces

GLM

• 50310

Mercruiser Stern Drive

• 807476A6
• 93320A13
• 93320A2
• 93320A3
• 93320A5
• 93320A6

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-1908	Barr MC-20-93320A3 Mallory 9-40530 Mercruiser Stern Drive 93320 Osco 3320	2	Manifold Riser Spacer		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
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	2	Pipe Plug		N/A
18-2849-1	Barr MC 47 27 87105 GLM 32080 Mallory 9-61414 Mercruiser Stern Drive 27-818832 27-860232 27-863726 27-87105 27-871051 Osco 8503-GO	2	Exhaust Elbow 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	2	Exhaust Elbow Gasket		N/A
18-0672	Barr MC 20 87918 MC-47-27-41811 GLM 30220 Mallory 9-61422 Mercruiser Stern Drive 27-41811 27-860231 27-863725 27-8637251 Osco 8503-GB	2	Exhaust Elbow Gasket		N/A
NSS	Mercruiser Stern Drive 11-49838	8	Lockwasher	No Image	N/A

Additional Details:

• Fits: V-6 & V-8 applications, 15° (3" O.D.)

Use With:

• 18-1952-1: Manifold
• 18-1953-2: Manifold
• 18-1957-2: Manifold
• 18-0897: Exhaust Elbow Gasket
• 18-2849-1: Exhaust Elbow Gasket
• 18-8529: Exhaust Elbow Mounting Kit

Interchanges/Replaces

Barr

• MC-20-98504

GLM

• 51110

Mallory

• 9-40557

Marine Power

• 0992-115

Mercruiser Stern Drive

• 95755A2
• 98503A2
• 98504A3

Osco

• 8503A

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