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Mercruiser manifold GM 427 454 482 V8 engine

427 - 454 - 482 years 1968 to 1986 V8 GM large block marine engine

  • Parts with tech drawings
  • V8 GM big block has an extra 30% water cooling area this will help reduce temperature in port exit area for longer gasket life.
  • The tunes design will reduce turbulence and enhance flow for higher and maximum marine engine power.
  • Mercruiser manifold gaskets

Tech support Exploded view drawings
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51264 port 51266 starboard GM 427 454 482.

51264 port 51266 starboard GM 427 454 482.

Item 1A
P/N 51264
OEM 47735A17 Exhaust manifold port $419.29

Item 1B
P/N 51266
OEM 47736A17 Exhaust manifold starboard $419.29

Item 2
P/N 33760
OEM 27-46820 Gasket *2 units $23.89

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

Item 4
P/N 31480
OEM 27-48042 Gasket exhaust elbow *2 units $4.89

Item 5
P/N 51010
OEM 60252A2 End cap $27.89

Item 6
P/N 51030
OEM 73813A1 End cap $25.89

Item 7
P/N 22449
OEM 10-35386 Screw *8 units $9.89

Item 8
P/N 51196
OEM 72963A9 Exhaust elbow Not available yet $162.96

Item 9
P/N 51194
OEM 76668A3 Exhaust elbow Not available yet $179.96

Item 10
P/N 22391
OEM 16-49545 Stud *4 units $8.89

Item 11
P/N 21248
OEM 11-49838 Flange serrated nut *5 units $4.89