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Mercruiser manifold 305-350 GM

GLM aftermarket parts for 305 and 350 GM small block
marine engines 1977 to 1982

  • GLM Marine aftermarket 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 body temperature significantly.
  • The tuned design will reduce turbulence and enhance flow for higher and maximum marine engine power.

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51237 port 51238 starboard gm V8 1977-1982

51237 port 51238 starboard gm V8 1977-1982

Item 1A
P/N 51237
OEM 77234A7 Exhaust manifold *port
Item 1B
Starboard side OEM 77235A8
Item 2
P/N 31100
Gasket-Exhaust manifold (2 units) OEM 27- 33395 $11.29

Item 3
P/N 31490
OEM 27- 48043- 1 Gasket-End cap *5 units $9.89

Item 4
P/N 31520
OEM 27- 99777- 2 Gasket-Exhaust elbow *2 units $4.89

Item 5
P/N 50006
OEM 60207 Plate $8.89

Item 6
P/N 51120
OEM 76351A2 Exhaust elbow assy.
3" 90 degree angle $138.89