Sierra / Mallory

Additional Details:

• Lower Tube: 4" or 101.6mm
• Fits: MCM GM V-6 & V-8 engines

Interchanges/Replaces

GLM

• 89130

Mallory

• 9-72811

Mercruiser Stern Drive

• 32-14358
• 32-14358001
• 32-14358T

Additional Details:

• Upper Tube: 4" or 101.6mm
• Fits: MCM 120, 140 & GM V-6 & V-8 engines

Use With:

• 18-1975-1: Riser With Exhaust Tube

Interchanges/Replaces

GLM

• 89120

Mallory

• 9-72805

Mercruiser Stern Drive

• 32-44348
• 32-44348001
• 32-44348T

Interchanges/Replaces

GLM

• 89220

Mallory

• 9-72806

OMC Stern Drive

• 912374

Additional Details:

• For: Mercury 15-25 Hp 2 cyl.

Interchanges/Replaces

Mercury Marine

• 27-414992
• 27-414993
• 27-414994
• 27-414995
• 27-892157

Mercury Race Outboard

• 27-414994

Key Features:

• Dry Joint Style

Additional Details:

• Fits: 2004 & newer MCM GM V-6 & V-8(305, 350 & 377 cid) eng. w/dry joint exh manifold (s/n 0W310000 & up)
• Fits: 2002 & newer MIE GM V-8 (350 & 377 cid) eng w/dry joint exh manifold (s/n 0M317000 & up)

Use With:

• 18-0720: Riser Gasket (Closed)
• 18-0721: Riser Gasket (Open)
• 18-0722: Riser Gasket (Restricted)
• 18-1843: Manifold
• 18-1842: V6 Dry Joint Exhaust Manifold

Interchanges/Replaces

Mercruiser Stern Drive

• 864591T02

Additional Details:

• For: Closed cooling
• Fits: GM V-6 & V-8 with center rise outlet exhaust manifold

Use With:

• 18-1908: Manifold Riser Spacer
• 18-1974-1: Elbow
• 18-1952-1: Manifold
• 18-1953-2: Manifold
• 18-1976-2: Manifold Elbow
• 18-1957-2: Manifold
• 18-1970-2: Riser Elbow

Interchanges/Replaces

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

Use With:

• 18-1911: Manifold End Plate
• 18-1948: Elbow

Interchanges/Replaces

Mallory

• 9-65301

Osco

• 121

Use With:

• 18-1925: Manifold
• 18-1926: Manifold
• 18-1929: Manifold
• 18-1933: Manifold
• 18-1916: Riser
• 18-1917: Block Off Manifold Plate
• 18-1927: Riser

Interchanges/Replaces

Barr

• CR 47 C 96108

Crusader

• 96108

Mallory

• 9-65400

Osco

• 6108

Interchanges/Replaces

Barr

• CR 47 C 96562

Crusader

• 96562

Mallory

• 9-65401

Osco

• 6562

Use With:

• 18-1938: Riser
• 18-1984: Manifold Spacer

Interchanges/Replaces

Barr

• CR 47 C 98127

Crusader

• 98127

GLM

• 36840

Mallory

• 9-65402

Osco

• 9015-G

Additional Details:

• Fits: MCM 120 (1993 & newer), 140/3.0L, 470, 165 in-line 6 cyl., GM V-8 small block (1982 & older)
• Fits: Ford V-8 engines

Use With:

• 18-1971: Elbow
• 18-1972: Elbow
• 18-1978: Elbow
• 18-1975-1: Riser With Exhaust Tube

Interchanges/Replaces

Barr

• MC472799777

GLM

• 31520

Mallory

• 9-61407

Mercruiser Stern Drive

• 27-52076
• 27-99777
• 27-997771
• 27-997772
• 27-99777B2

Osco

• 52076

Additional Details:

• For: Standard cooling, restrictor gasket
• Fits: 1981-1997 GM V-6 & V-8 Engines with center rise outlet exhaust manifold

Use With:

• 18-1908: Manifold Riser Spacer
• 18-1974-1: Elbow
• 18-8556: Exhaust Elbow Mounting Kit
• 18-1952-1: Manifold
• 18-1953-2: Manifold
• 18-1958-1: Manifold
• 18-1962-1: Manifold
• 18-1985: Manifold Spacer
• 18-1976-2: Manifold Elbow
• 18-1957-2: Manifold
• 18-1970-2: Riser Elbow

Interchanges/Replaces

Barr

• MC 20 99208
• MC47-27-41813

GLM

• 30240

Mallory

• 9-61413

Mercruiser Stern Drive

• 27-41813
• 27-860233
• 27-863724

Osco

• 8503-GR

Additional Details:

• Fits: MIE 470

Interchanges/Replaces

Barr

• MC47-27-92720

GLM

• 32630

Mallory

• 9-61415

Mercruiser Stern Drive

• 27-92720

Additional Details:

• Fits: MCM 3.7L engines with aluminum exhaust manifolds (1985-1989)

Use With:

• 18-8530: Exhaust Elbow Mounting Kit
• 18-1937: Elbow

Interchanges/Replaces

GLM

• 32470

Mallory

• 9-61412

Mercruiser Stern Drive

• 27-18272
• 27-97863

Osco

• 8561-G

Exhaust Elbow Gasket
Replaces: Mercury Marine 27-18272
For: 3.7L w/aluminum manifolds 1985-89
Our outdrive mounting gaskets are more tear resistant than the OEM and other aftermarket competitors and feature our exclusive “anti-stick” coating for easy removal the next time they need replaced.

Additional Details:

• For: Mercruiser GM V-6 229 & 262 cu. in. (models 185 & 205)
• For: GM Small Block V-8 305-350 cu. in. (models 200, 228, 230, 260 & 898)
• For: GM Big Block V-8 454 cu. in. (models 330, 340 & 7.4L)

Use With:

• 18-1976-2: Manifold Elbow

Interchanges/Replaces

Mallory

• 9-40578

Osco

• 4354-MK

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: Mercruiser 4 cyl. 224 cu. in. 3.7L (models 165, 170, 180 & 190)

Use With:

• 18-1937: Elbow

Interchanges/Replaces

Mallory

• 9-40581

Osco

• 8561-MK

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-0881-1	GLM 32470 Mallory 9-61412 Mercruiser Stern Drive 27-18272 27-97863 Osco 8561-G	1	Exhaust Elbow Gasket		N/A
NSS	Mercruiser Stern Drive 10-52143	4	Screw	No Image	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

Key Features:

• OMC GM Small Block V8 305-350 cu. in. (1979-1989) & mult application for Ford & GM risers

Use With:

• 18-1921: Manifold Elbow

Interchanges/Replaces

Mallory

• 9-40670

Osco

• 9863-MK

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

Key Features:

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

Use With:

• 18-1909-1: Riser

Interchanges/Replaces

Barr

• CM 20 6674J P

Mallory

• 9-40672

Osco

• 50456-MK

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
NSS	Mercruiser Stern Drive 13-35048	4	Washer (3/8)	No Image	N/A