Mercruiser GM Big Block V8 (330, 340, 7.4L) Sterndrive Exhaust Manifold Exploded View

Sierra
Mercruiser GM Big Block V8 (330, 340, 7.4L) Sterndrive Exhaust Manifold Exploded View
Mercruiser Sterndrive Exhaust Manifold Exploded View Diagram and Parts
Fits GM Big Block V8 454 cu. in.
Models 330, &7.4L
Figure #DescriptionO.E.M. #Sierra #Application
1MANIFOLD807078A6 18-1957-1GM Big Block (V8) 454 cu.in. Models 330, 340 & 7.4L. Use with 18-0418 manifold gasket; Mounting Kit: 18-8532
2ELBOW GASKET (BLOCKED)27-860231 18-0672Fits Manifold: 18-1957-1; Elbows: 18-1970-1, & 18-1976-1, 18-1974: Spacer 18-1908.
3ELBOW GASKET (OPEN)27-818832 18-2849Fits Manifold: 18-1957-1; Elbows: 18-1970-1, & 18-1976-1, 18-1974: Spacer 18-1908.
4MOUNTING STUDN/ANSSIncluded in 18-8554 mounting kit.
5MOUNTING STUDN/ANSSIncluded in 18-8529 mounting kit.
6MOUNTING BOLTN/ANSSIncluded in 18-8505 mounting kit.
7MOUNTING BOLTN/ANSSIncluded in 18-8532 mounting kit.
8MANIFOLD ELBOW98502A2 18-1974-1Fits Manifold: 18-1957-1. Use Elbow gaskets: 18-2849, 18-0897, or 18-0672; Use mounting kit: 18-8529 (Do not use with spacer)
9MANIFOLD ELBOW44354A3 18-1976-1Fits Manifold: 18-1957-1. Use Elbow gaskets: 18-2849, 18-0897, or 18-0672; Use mounting kit: 18-8505, or if spacer is included use 18-8555
10MANIFOLD ELBOW98504A3 18-1970-1Fits Manifold: 18-1957-1. Use Elbow gaskets: 18-2849, 18-0897, or 18-0672; Use mounting kit: 18-8529, or if spacer is included use 18-8554.
11HOSE FITTINGN/A18-82163/4" - 14NPT X 1" Hose (Corrosion Resistant Brass Fitting)
12HOSE FITTINGN/A 18-44613/4" - 14NPT X 1" Hose (Corrosion Resistant Brass Fitting)
13HOSE FITTINGN/A18-82153/4" - 14NPT X 3/4" Hose (Corrosion Resistant Brass Fitting)
14MANIFOLD SPACER KIT807476A6, 93320A5 18-1908K3" Riser Kit for Manifold: 18-1957-1. Includes (2) spacers, restrictor, open, & blocked gasket. All necessary mounting hardware is also included.
15MOUNTING KITN/A 18-8554Use 18-8554 Mounting Kit when 18-1908 Spacer, 18-1970-1 Elbow and 18-1974 Elbow are used together. Included in 18-1908K. Includes (1) 18-2849 & 18-0897 elbow gaskets.
16MOUNTING KITN/A 18-8555Use with Manifold Spacer: 18-1908 with Riser 18-1976-1. Included in 18-1908K. Includes (1) 18-2849 & 18-0897 elbow gaskets.
17MOUNTING KITN/A 18-8556Use with Manifold Spacer: 18-1985. Includes (1) 18-2849 & 18-0897 elbow gaskets
18MOUNTING KITN/A 18-8505Use with Riser: 18-1976-1. Includes 18-0897 elbow gasket.
19MOUNTING KITN/A 18-8529Use with Risers: 18-1970-1 & 18-1974-1. Includes 18-0897 elbow gasket.
20MOUNTING KITN/A 18-8532Use with Manifold: 18-1957-1. Includes 18-0418 manifold gasket.
21MANIFOLD GASKET96653 / 27-46820 18-0418Use with Manifold: 18-1957-1. Included in 18-8532 mounting kit.
22ELBOW GASKET (RESTRICTOR)27-41813 18-0897Fits Manifold: 18-1957-1; Manifold Spacers: 18-1985, & 18-1908; Elbows: 18-1970-1, & 18-1976-1, 18-1974
23MANIFOLD SPACER93322A12 18-19083" Spacer for Manifold: 18-1952-1. Use with mounting kit 18-8556. (Note: To mount elbows to spacer a separate mounting kit is needed)
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Full StarEmpty StarEmpty StarEmpty StarEmpty Starnot funny
by Gerald from Napa, California on March 07, 2013
I have already corresponded with you twice about how unhappy I was with the last shippment.I guess you didn't believe me or the word wasn't passed down. Now that doesn't suprise me.I did exchange a couple of futile emails with some air head that could care less about customer service.Next thing you would probably tell me is he was service all star of the year. I paid $13.00 for a three day delivery that took six or maybe seven due to factors you claim were out of your control. These small liteweight gaskets could have been sent in a regular envelope but nope they had to come in a stupid big box expensive and late at that.I will be buying more marine products in the future.I own a large cruiser and a smaller boat as you know call for continued upkeep. In the future I will not be spending another penny with your establishment. That by the way is how it works. Crappy service and some bone head that could care less giving lame excuses as to why this didn't go of as needed.Please remove any acount information you have. I will think about you when I spend however much on marine parts from someone a little more accomadating.If you find this email humorus there in may be part of the problem.
(5 of 6 people found this review helpful)
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Full StarFull StarFull StarFull StarFull Starriser
by Eric from Pointe Claire, Quebec on July 09, 2014
perfect
(1 of 1 people found this review helpful)
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Full StarEmpty StarEmpty StarEmpty StarEmpty StarExhaust Manifold Elbow Gasket
by Elizabeth from Slate Hill, New York on July 17, 2015
they were bent/kinked and unusable. thanks
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Full StarFull StarFull StarFull StarFull Starelbow gasket
by Jeffrey from Knoxville, Iowa on November 02, 2013
1989 454 closed cooling. Works great.
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Full StarFull StarFull StarFull StarFull StarExhaust manifold elbow
by Richard from Brentwood, New Hampshire on June 10, 2016
Great product for the price and exact fit.
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Full StarFull StarFull StarFull StarFull StarReview for Sierra 18-8554 Exhaust Elbow Mounting Kit
by a Customer on May 28, 2009
(0 of 2 people found this review helpful)
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Full StarFull StarFull StarFull StarFull StarFantastic Bargain
by Bruce from Lexington Park, Maryland on June 23, 2016
With most other companies selling the manifolds and gasket sets separately, this was a nice surprise. All gaskets, hose connectors and pipe plugs included. Was out of the box and installed in minutes. Great product. Highly recommended.
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Full StarFull StarFull StarFull StarFull Starfast shipping
by Stan from Jacksonville, Florida on August 07, 2014
.
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Q:
I have a 1989 merc. with 5.7 chev. 350. Looking for the manifold. What is the right one for it?
A:
We would need to cross reference OEM number so we would need an engine serial number. Contact us at the number at the top of the page with that info.
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Your Price: $4.81
Save: $2.53
(34% Off $7.34)
Part # 18-0897 ValueShip™ Eligible
SHIPS TODAY!* if ordered in 4 hrs 34 mins.
Replaces OEM part #
  • MERCURY MARINE 27-41813
Used with:
    Fits Manifold: 18-1957-1, 18-1952-1, 18-1958, 18-1962
    Manifold Spacers: 18-1985, & 18-1908
    Riser: 18-1976-1, 18-1970-1, 18-1974
Included in 18-8554 mounting kit
Your Price: $116.49
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Part # 18-1976-1 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 44354A3
  • MERCURY MARINE 807988A2
For: most Mercruiser V-6 & V-8 applications 7° (4" O.D. Riser)
Comes with 18-0897,18-4263 & 18-4258
Use with:
    Manifold: 18-1952-1, 18-1953-1, 18-1957-1
    Riser Gasket: 18-0897 restrictor, 18-2849 open, 18-0672 blocked
    Mounting Kit: 18-8505, or if spacer is included use 18-8555
Your Price: $14.23
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For: Mercruiser GM V6 229 and 262cu.in. (Models 185 and 205), GM Small Block V8 305-350cu.in. (Models: 200, 228, 230, 260, 898), GM Big Block V8 454cu.in. (Models: 330, 340 and 7.4L)

Used with:
    Riser: 18-1976-1
Includes 18-0897 elbow gasket
Your Price: $17.32
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Part # 18-0672-9 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-8637251
  • MERCURY MARINE 27-860231
Package of 2
Used with:
    Riser: 18-1970-1, 18-1976-1, 18-1974
    Fits Manifold: 18-1957-1
    Spacer: 18-1908
Your Price: $99.21
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Replaces OEM part #
  • MERCURY MARINE 93320
For: Mercruiser GM V6 229 and 262cu.in. (Models: 185 and 205),GM Small Block V8 305-350cu.in. (Models: 200, 228, 230, 260 and 898), GM Big Block V8 454cu.in. (Models: 330, 340 and 7.4L)
Used with:
    Manifolds: 18-1952-1, 18-1953-1, 18-1957-1
Use with mounting kit 18-8556. To mount elbows to spacer a separate mounting kit is needed
Your Price: $215.04
Save: $103.52
(32% Off $318.56)
Part # 18-1974-1 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 98502A2
For: Mercruiser V-6 & V-8 applications 0° (3" O.D. Riser)
Comes with 18-0897 gasket & brass plugs

Fits Manifold: 18-1957-1
Use Elbow Gaskets: 18-2849, 18-0897, or 18-0672
Use Mounting Kit: 18-8529 (Do not use with spacer)
Your Price: $9.80
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Part # 18-8529 ValueShip™ Eligible
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For: Mercruiser GM V6 229 and 262cu.in. (Models 185 and 205), GM Small Block V8 305-350cu.in. (Models: 200, 228, 230, 260, 898), GM Big Block V8 454cu.in. (Models: 330, 340 and 7.4L)

Used with:
    Riser: 18-1970-1 and 18-1974-1
Includes 18-0897 elbow gasket
Your Price: $14.97
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Part # 18-8532 ValueShip™ Eligible
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For: Mercruiser GM Big Block V8 454cu.in. (Models: 330, 340 and 7.4L)

Used with:
    Manifold: 18-1957-1
Includes 18-0418 manifold gasket
Your Price: $11.15
Save: $5.30
(32% Off $16.45)
Part # 18-4461 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 22-807155
3/4" - 14 NPT X 1" Hose
Corrosion Resistant Brass Fitting
Your Price: $37.83
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Part # 18-8555 ValueShip™ Eligible
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For: Mercruiser 229 and 262 ci V6, 305 and 350 SB V8, 454 Big Block V8.

Used with:
    Riser Kit: 18-1908K and 18-1908 Spacer
    Riser: 18-1970-1
    Manifolds: 18-1952-1
Includes (1) 18-2849 & 18-0897 elbow gaskets
Your Price: $12.80
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Part # 18-2849-9 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 27-818832
  • MERCURY MARINE 27-863726
  • MERCURY MARINE 27-87105-1
Package of 2
Use With:
    Manifold: 18-1957-1, 18-1952-1, 18-1958, 18-1962
    Elbow: 18-1976-1, 18-1970-1, 18-1974
    Spacer: 18-1908, 18-1985
Included in 18-8554 mounting kit
Your Price: $37.96
Save: $16.07
(29% Off $54.03)
Part # 18-8554 ValueShip™ Eligible
SHIPS TODAY!* if ordered in 4 hrs 34 mins.
For: Mercruiser 229 and 262 ci V6, 305 and 350 SB V8, 454 Big Block V8.

Used with:
    Riser Kit: 18-1908K and 18-1908 Spacer
    Riser: 18-1970-1, 18-1971, 18-1978
    Manifold: 18-1952-1
    Manifold Spacer: 18-1906
Use 18-8554 Mounting Kit when 18-1908 Spacer, 18-1970-1 Elbow and 18-1974 Elbow are used together
Included in 18-1908K
Includes (1) 18-2849 & 18-0897 elbow gaskets
Your Price: $199.98
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Part # 18-1957-1
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Replaces OEM part #
  • MERCURY MARINE 807078A 6
  • MERCURY MARINE 89011A8
Fits most Mercruiser (GM) V-8 big blocks with center riser, 454 cu.in. Models 330, 340 & 7.4L, Port & Starboard
WILL FIT EITHER SIDE
Use with:
    Exhaust Manifold Gasket: 18-0418
    Mounting Kit: 18-8532
Your Price: $117.05
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Replaces OEM part #
  • MERCURY MARINE 98504A3
For: V-6 & V-8 applications 15° (3" O.D. Riser) Comes with 18-0897 & brass plugs
Use with:
    Manifold: 18-1952-1, 18-1953-1, 18-1957-1
    Elbow Gasket: 18-0897 restrictor, 18-2849 open, 18-0672 blocked
    Mounting Kit: 18-8529 or if spacer is included use 18-8554
Your Price: $9.49
Save: $4.45
(31% Off $13.94)
Part # 18-0418 ValueShip™ Eligible
SHIPS TODAY!* if ordered in 4 hrs 34 mins.
Replaces OEM part #
  • CRUSADER 96653
  • BARR CHVA-47-0000
  • GM 3852472
  • MERCURY MARINE 27-46820
  • OMC 909613
  • VOLVO 3852472
Used with:
    Manifolds: 18-1957-1, 18-1982, 18-1929, 18-1933, 18-1898
Included in 18-8532 mounting kit
Your Price: $12.54
Save: $6.52
(34% Off $19.06)
Part # 18-8556 ValueShip™ Eligible
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For: 229 and 262 ci V6, 305 and 350 SB V8, 454 Big Block V8.

Used to mount:
    Spacer 18-1985 to Manifolds 18-1953-2, 18-1957-1 and 18-1952-1
Includes (1) 18-2849 & 18-0897 elbow gaskets
Your Price: $104.75
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Mercruiser Spacer, 3" center riser.


Replaces:

  • Mercruiser # 93320

Engine Type:
GM V6 229 and 262 cu.in.GM Small Bolck V8 305-350 cu.in.GM Big Block V8 454 cu.in.


Engine Model:
185 and 205200, 228, 230, 260 and 898330, 340 and 7.4L


Fits T-20952/ T-20953/ T-20957 manifold. Sold each.

Your Price: $156.70
Save: $112.30
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Part # T-20957
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Mercruiser Manifold


Replaces OEM #:

  • Mercruiser 89011

Fits both sides of engine.


Engine Type:
GM Big Block V8 454 cu.in.


Engine Model:
330, 340 and 7.4L

Your Price: $107.19
Save: $61.63
(36% Off $168.82)
Part # T-20970 ValueShip™ Eligible
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Riser, 3" exhaust outlet, 15° down angle.


Replaces OEM #:

  • Mercruiser 98503
  • Mercruiser 98504

For early model inboard/outboards.


Engine Type:
GM V6 229 and 262 cu.in.GM Small Block V8 305-350 cu.in.GM Big Block V8 454 cu.in.


Engine Model:
185 and 205200, 228, 230, 260 and 898330, 340 and 7.4L

Your Price: $132.58
Save: $90.30
(40% Off $222.88)
Part # T-20975 ValueShip™ Eligible
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Mercruiser Riser, 4" exhaust outlet, 90° down angle.


Replaces OEM #:

  • Mercruiser 12076 and 2-piece offset adapter and riser #s' 95863 and 76325

Engine Type:
GM Four Cylinder 181 cu.in.


Engine Model:
Models 120/140/2.5L/3.0L

Your Price: $93.37
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(41% Off $158.76)
Part # T-20976 ValueShip™ Eligible
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Riser, 4" exhaust outlet, 7° down angle. For late model inboard/outboard and inboards.

Replaces OEM #:

  • Mercruiser 44354
  • Mercruiser 807914
  • Mercruiser 807988

Fits Engine Type:

GM V6 229 and 262 cu.in.GM Small Bolck V8 305-350 cu.in.GM Big Block V8 454 cu.in.

Engine Model

185 and 205200, 228, 230, 260 and 898330, 340 and 7.4L