Additional Details:

• Application: V-8 inboard applications only

Use With:

• 18-1950-1: Manifold
• 18-1951-1: Manifold
• 18-1954-1: Manifold
• 18-1955-1: Manifold
• 18-1958-1: Manifold
• 18-1960-1: Manifold
• 18-1962-1: Manifold
• 18-2833: Exhaust Elbow Gasket
• 18-4362: Exhaust Elbow Mounting Package
• 18-1906: Manifold Spacer
• 18-4008: Block Off Plate
• 18-8514: Exhaust Elbow Mounting Kit
• 18-8554: Exhaust Elbow Mounting Kit
• 18-1956-3: Manifold

Interchanges/Replaces

Barr

• MC-20-76771

GLM

• 51190

Mallory

• 9-40556

Mercruiser Stern Drive

• 53779A1
• 53779A2
• 60427A2
• 76771A2
• 76771A3

Osco

• 6771

Additional Details:

• Fits: MCM 140 (1966-1982), 470 (1976-1977), 165 & 200 in-line 6 cyl.
• Fits: MCM Ford V-8 engines & MCM GM V-8 (305 & 350 cid) engines (1982 & older)

Use With:

• 18-1950-1: Manifold
• 18-1951-1: Manifold
• 18-1954-1: Manifold
• 18-1955-1: Manifold
• 18-1958-1: Manifold
• 18-1960-1: Manifold
• 18-1962-1: Manifold
• 18-2833: Exhaust Elbow Gasket
• 18-4362: Exhaust Elbow Mounting Package
• 18-4364: Exhaust Elbow Mounting Package (Open)
• 18-1906: Manifold Spacer
• 18-4008: Block Off Plate
• 18-8514: Exhaust Elbow Mounting Kit
• 18-8554: Exhaust Elbow Mounting Kit
• 18-1956-3: Manifold

Interchanges/Replaces

Barr

• MC 20 76351
• MC-20-60426

GLM

• 51120

HGE

• 6351

Mallory

• 9-40558

Marine Power

• 0993-001

Mercruiser Stern Drive

• 49964A1
• 49964A2
• 60426A1
• 76351A04
• 76351A1
• 76351A2

Osco

• 6351

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