Exhaust manifold GM 427 454 482 V8 engine

Mercruiser exhaust manifold for use with 427 - 454 - 482 (1968 thru 1986) V8 GM large block marine engines

Parts with tech drawings
Aftermarket parts for use with Mercruiser Models: 325 / 330 / 350 / 400 GM marine engines.
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

GM marine engines 427, 454 and 482 CID V8 boats

51264 port 51266 starboard GM 427 454 482.jpg

# 51264 port and # 51266 starboard GM 427 454 482 years 1968-1986

Ref.

GLM #

OEM number

Manifold descriptions

Add to cart

1a

51264

47735A17

Exhaust manifold (port)

$419.29

1b

51266

47736A17

Exhaust manifold (starboard)

$419.29

2

33760

27-46820

Gasket (2 units) - exhaust manifold

$23.89

3

31490

27-48043-1

Gasket end cap

(5 units)

$9.89

4

31480

27-48042

Gasket exhaust elbow

(2 units)

$4.89

5

51010

60252A2

End cap

$27.89

6

51030

73813A1

End cap

$25.89

7

22449

10-35386

Screw (8 units)

$9.89

8

51196

72963A9

Exhaust elbow

Not available yet
$162.96

9

51194

76668A3

Exhaust elbow

Not available yet
$179.96

10

22391

16-49545

Stud (4 units)

$8.89

11

21248

11-49838

Flange serrated nut

(5 units)

$4.89

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