Sierra / Mallory

Additional Details:

• Material: CAST IRON

Use With:

• 18-1932: Manifold
• 18-2971: Exhaust Manifold Gasket
• 18-19360: Mounting Kit

Interchanges/Replaces

GLM

• 51520

HGE

• 7037

Volvo Penta

• 857037

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

Key Features:

• Fits: 170 (1974), 175 (1975-76), 190 (1974-76), 235 (1975-76)

Use With:

• 18-1904: Manifold
• 18-2850: Manifold End Cap Gasket

Interchanges/Replaces

OMC Stern Drive

• 980617

Key Features:

• For use with 3" I.D. exhaust hose

Additional Details:

• Material: Cast Iron
• For: Ford Small Block V8 302-351 cu. in.

Use With:

• 18-1997-1: Manifold
• 18-1998-1: Manifold
• 18-4364: Exhaust Elbow Mounting Package (Open)
• 18-8535: Exhaust Elbow Mounting Kit (Blocked)
• 18-8538: Exhaust Manifold Mounting Kit
• 18-0476-1: Riser Block Off Gasket
• 18-2854-1: Exhaust Elbow Gasket

Interchanges/Replaces

Barr

• 20-0100
• 20-0102

GLM

• 56120

Indmar

• 53-2009
• 53-2018

Mallory

• 9-40112

Osco

• 2018

Key Features:

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

Additional Details:

• Material: Cast Iron
• Use: With 4" I.D. exhaust hose

Use With:

• 18-1898: Manifold
• 18-1997-1: Manifold
• 18-1998-1: Manifold
• 18-4364: Exhaust Elbow Mounting Package (Open)
• 18-8535: Exhaust Elbow Mounting Kit (Blocked)
• 18-0476-1: Riser Block Off Gasket
• 18-2854-1: Exhaust Elbow Gasket

Interchanges/Replaces

Barr

• 20-0100

GLM

• 56140

Mallory

• 9-40113

Marine Power

• 0992-593

Osco

• 99204

Key Features:

• Fits many GM & Ford center rise manifolds
• 4" outlet 7°

Additional Details:

• Material: CAST IRON

Use With:

• 18-1848: Manifold
• 18-1986-1: Manifold
• 18-8507: Exhaust Elbow Mounting Kit
• 18-0943-2: Exhaust Elbow Gasket

Interchanges/Replaces

Barr

• OMC-20-913784

GLM

• 51330

HGE

• 3784

Mallory

• 9-40911

OMC Stern Drive

• 3850456
• 3855270
• 3856444
• 3857944
• 913784

Osco

• 50456

Volvo Penta

• 3855270
• 3857944
• 3863061

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

Additional Details:

• Size: 4" or 101.6mm
• For: Crusader GM Small Block V8 305-350cu.in. (Models 220 & 270)
• For: Crusader GM Big Block V8 454cu.in (Models CH350 and 454XL)

Use With:

• 18-1925: Manifold
• 18-1926: Manifold
• 18-1929: Manifold
• 18-1933: Manifold
• 18-8523: Exhaust Elbow Mounting Kit
• 18-1918: Elbow
• 18-1928: Elbow w/ 4" Outlet
• 18-1934: Elbow w/ 3" Outlet
• 18-0305-1: Exhaust Elbow Gasket
• 18-0309-1: Exhaust Elbow Gasket

Interchanges/Replaces

Barr

• CR 20 97772

Crusader

• 97772

Mallory

• 9-40401

Osco

• 7772

Additional Details:

• Size: 8" or 203.2mm
• For: Crusader GM Small Block V8 305-350cu.in. (Models 220 & 270)
• For: Crusader GM Big Block V8 454cu.in (Models CH350 and 454XL)

Use With:

• 18-1925: Manifold
• 18-1926: Manifold
• 18-1929: Manifold
• 18-1933: Manifold
• 18-8519: Exhaust Elbow Mounting Kit
• 18-1918: Elbow
• 18-1928: Elbow w/ 4" Outlet
• 18-1934: Elbow w/ 3" Outlet
• 18-0305-1: Exhaust Elbow Gasket
• 18-0309-1: Exhaust Elbow Gasket

Interchanges/Replaces

Barr

• CR 20 97169

Crusader

• 97169

Mallory

• 9-40410

Osco

• 7169

Use With:

• 18-1971: Elbow
• 18-1978: Elbow

Interchanges/Replaces

Barr

• MC20-60426P

GLM

• 53100

Mallory

• 9-40170
• 9-40586

Osco

• 6371-MK

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
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
NSS	Mercruiser Stern Drive 11-49838	4	Nut	No Image	N/A
NSS	Mercruiser Stern Drive 13-35048	4	Lockwasher	No Image	N/A
NSS	Mercruiser Stern Drive 16-49545	4	Stud	No Image	N/A

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]

Additional Details:

• Fits: MCM/MIE GM V-6 & V-8 (283, 305 & 350 cid) engines

Interchanges/Replaces

Mercruiser Stern Drive

• 35329
• F3746241
• FI1100014
• FI1100495

List of Containing Parts

Additional Details:

• Fits: GM V-6 & V-8 engines

Key Features:

• Recessed Grooved Valve Cover

Additional Details:

• Fits: MCM/MIE GM V-8 (454 & 502 cid) engines (Gen V & VI) (1992 & Newer)

Interchanges/Replaces

Mallory

• 9-61315

Mercruiser Stern Drive

• 27-811588
• 27-8M0092920

Additional Details:

• Fits: MCM 420, 425, 440, 450, 465, 500, 500 Bulldog, 525SC, 525SC, 600SC & 800SC

Interchanges/Replaces

Mallory

• 9-61311

Mercruiser Stern Drive

• 27-14765
• F3860315
• FI1100958
• FI1101294

Interchanges/Replaces

GLM

• 22850

Johnson/Evinrude Outboard

• 396041

Mallory

• 9-51104

Additional Details:

• For: Mercury 30-60HP 2&3 Cyl., Mag II, V-135-200, & XR4

Interchanges/Replaces

Chrysler/Force/US Marine

• 31-17514A2

GLM

• 16200

Mercury Marine

• 31-17514
• 31-17514A1
• 31-17514A2
• 31-67526
• 31-67526A1
• 31-67526A2
• 31-814337A1
• 31-821146A1
• 31-8M0045428
• 31-8M0045430
• 879366

Mercury Race Outboard

• 31-17514A1

Mercury Sport Jet

• 31-8M0045428

Additional Details:

• Size: Standard

Interchanges/Replaces

Mercruiser Stern Drive

• 23-11992
• 23-11992001

Additional Details:

• Size: 0.010" or .25mm

Interchanges/Replaces

Mercruiser Stern Drive

• 23-1596110
• 23-52224
• 23-52273
• 23-85704
• FI1100381
• FI1100573

Interchanges/Replaces

Johnson/Evinrude Outboard

• 308186

OMC Stern Drive

• 308186

Interchanges/Replaces

Johnson/Evinrude Outboard

• 330081

Interchanges/Replaces

Johnson/Evinrude Outboard

• 308186

OMC Stern Drive

• 308186