Mercruiser Manifolds GM 305/350 V8 1977-1982

GLM aftermarket Mercruiser manifold, elbows and parts. 305 and 350 GM small block marine engines 1977 to 1982

GLM Marine aftermarket Mercruiser manifolds for use with models: 198 and 898 GM marine engines years 1977 to 1985.
In V8 GM small block, fully tuned design will guide exhaust gases directly to elbow without turbulence and back pressure.
In the meantime, additional 40% water cooling area will decrease the entire manifold body temperature significantly.
The tuned design will reduce turbulence and enhance flow for higher and maximum marine engine power.

Click here for models198 & 898 GM engine parts

51237 port 51238 starboard gm V8 1977 1982

# 51237 Port side # 51238 Starboard side GM 305 & 350 V8 (1977 to 1982)

Ref.

GLM #

OEM number

Manifold descriptions

1a

51237

77234A7

Exhaust manifold (port)

# 51237
Not available yet

1b

51238

77235A8

Exhaust manifold (starboard)

# 51238
Not available yet

2

31100

27- 33395

Gasket-Exhaust manifold (2 units)

# 31100 $11.29

3

31490

27- 48043- 1

Gasket-End cap (5 units)

# 31490 $9.89

4

31520

27- 99777- 2

Gasket-Exhaust elbow (2 units)

# 31520 $4.89

5

50006

60207

Plate

# 50006 $8.89

6

51120

76351A2

Exhaust elbow assy. 3" 90 degree angle

# 51120 $138.89

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