OMC Sterndrive/Cobra Exhaust Manifolds

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HP/Liter/CID/Model

Year

Exhaust Manifold

Exhaust Manifold

5 1988 18-1902 T-20902
[350] King Cobra 1988 18-1902 T-20902
5 1988 18-1903 T-20903
[350] King Cobra 1988 18-1903 T-20903
5.7 1988 18-1902 T-20902
[350] King Cobra 1988 18-1902 T-20902
5.7 1988 18-1903 T-20903
[350] King Cobra 1988 18-1903 T-20903
[5.0] Liter 1987 18-1902 T-20902
[5.0] Liter 1987 18-1903 T-20903
[5.7] Liter 1987 18-1902 T-20902
[5.7] Liter 1987 18-1903 T-20903
[5.0] Liter 1986 18-1902 T-20902
[5.0] Liter 1986 18-1903 T-20903
[5.7] Liter 1986 18-1902 T-20902
[5.7] Liter 1986 18-1903 T-20903
[5.0] Liter 1985 18-1902 T-20902
[5.0] Liter 1985 18-1903 T-20903
[5.7] Liter 1985 18-1902 T-20902
[5.7] Liter 1985 18-1903 T-20903
[5.0] Liter 1984 18-1902 T-20902
[5.0] Liter 1984 18-1903 T-20903
[5.7] Liter 1984 18-1902 T-20902
[5.7] Liter 1984 18-1903 T-20903
[5.0] Liter 1983 18-1902 T-20902
[5.0] Liter 1983 18-1903 T-20903
[5.7] Liter 1983 18-1902 T-20902
[5.7] Liter 1983 18-1903 T-20903
[5.0] Liter 1982 18-1902 T-20902
[5.0] Liter 1982 18-1903 T-20903
[5.7] Liter 1982 18-1902 T-20902
[5.7] Liter 1982 18-1903 T-20903
800 Series, [200] 1981 18-1902 T-20902
800 Series, [230] 1981 18-1902 T-20902
800 Series, [260] 1981 18-1902 T-20902
800 Series, [200] 1981 18-1903 T-20903
800 Series, [230] 1981 18-1903 T-20903
800 Series, [260] 1981 18-1903 T-20903
800 Series, [185-260] 1980 18-1902 T-20902
800 Series, [185-260] 1980 18-1903 T-20903
800 Series, [185-230] 1979 18-1902 T-20902
800 Series, [185-230] 1979 18-1903 T-20903
800 Series, [260] 1979 18-1902 T-20902
800 Series, [260] 1979 18-1903 T-20903
800 Series, [185-225] 1978 18-1902 T-20902
800 Series, [185-225] 1978 18-1903 T-20903
[175-235] 1976 18-1904 -
[175-235] 1975 18-1904 -
170 1974 18-1904 -
190 1974 18-1904 -

HP/Liter/CID/Model

Year

Exhaust Manifold

Exhaust Manifold

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Your Price: $558.60
Save: $146.55
(20% Off $705.15)
Part # 18-1901
Hurry! Only 1 left in stock
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Port and Starboard

Replaces OEM part #
  • OMC 984054
  • Application: GM 181 cu. in. 3.0L, 4 cylinder. Fits most 140 models
    Use with: Exhaust Elbow Gasket: 18-1204, End Plate: 18-4009
Your Price: $181.68
Save: $96.78
(34% Off $278.46)
Part # 18-1902
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V-8 Starboard Side
Fits most GM V-8 small blocks with end riser
Use with: Mounting Kit 18-8502

Replaces OEM part #
  • OMC 912441
Your Price: $181.92
Save: $90.81
(33% Off $272.73)
Part # 18-1903
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Replaces OEM part #
  • OMC 912442 V-8 Port side
    Fist most GM V-8 small blocks with end riser
    Use with: mounting Kit: 18-8502
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Port and Starboard
Fits most Ford V-8 302 & 315 W with end riser
Use with: Exhaust Manifold Gasket: 18-0183 or 18-2896

  • Replaces O.E.part #

  • OMC 980959 V-8, either side
    Your Price: $205.91
    Save: $110.35
    (34% Off $316.26)
    Part # 18-1986-1
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    Port and Starboard
    For:
    • GM Small Block V8 305-350 ci
    • 5.0L & 5.7L GM (New Style)

    Use with:
    • Exhaust Manifold Gasket: 18-2949
    • Mounting Kit:18-8550

    Replaces OEM part #
    • OMC 3852374-2
    • OMC 3857723
    • VOLVO 3852374-2
    • VOLVO 3857723
     
    Your Price: $233.67
    Save: $95.02
    (28% Off $328.69)
    Part # 18-1898
    Port or Starboard
    Fits 454 cu. in. GM big block V8 engines
    Use with: Exhaust Gasket: 18-0418
    Riser Gasket: 18-2854 open or 18-0476 blocked

    Replaces OEM part #
    • BARR CHVA-1-84
    • MARINE POWER 0991-110
    Your Price: $175.17
    Save: $95.69
    (35% Off $270.86)
    Part # 18-1997-1
    Hurry! Only 1 left in stock
    Universal Center Riser Manifold
    Port or Starboard
    Fits:
    • GM 283, 305, 307, and 350 CID engines
    • Chriscraft 283, 302, 307 and 350 CID engines
    • Crusader 283 and 327 CID engines thru 1964; 305, 307 and 350 CID engines 1965 and later
    • Daytona 200-283 and 300-327
    • Flagship 283, 327 and 350 CID engines
    • Pacer 305, 307 and 350 CID engines 1965 and later
    • Mercury 190, 198, 225, 250, 270, 228, 898, 260, 255 and 280 models
    • OMC 283, 305, 307 and 350 CID engines 1968-1980
    • Volvo 307 and 350 CID engines
    Use 18-0604 Exhaust Manifold Gasket Set

    Replaces OEM part #
    • BARR CHV-1-83
    Your Price: $194.77
    Save: $83.59
    (30% Off $278.36)
    Part # 18-1998-1
    Hurry! Only 1 left in stock
    Port or Starboard
    Universal Center Riser Manifold

    Fits: Ford 302 and 351 CID engines
    Crusader 302 and 351 CID engines
    Interceptor 221, 260, and 289 cid engines
    Commander, Mercury, OMC, Palmer, Pleasurecraft & Waukesha

    Comes with: 18-4363 mounting package
    Use with: Exhaust Manifold Gasket Set 18-0603

    Replaces OEM part #
    • BARR FM-1-83
    Your Price: $201.99
    Save: $68.01
    (25% Off $270.00)
    Part # 9-40601
    No Reviews  |  Write Review  |  Ask Question
    Manifold, Port
    Fits 305 - 350 CID V-8
    Includes hose and clamp
    Use 9-40671 mounting kit
    OEM 910144, 909279, 912442
    Your Price: $201.99
    Save: $73.69
    (26% Off $275.68)
    Part # 9-40602
    No Reviews  |  Write Review  |  Ask Question
    Manifold, Starboard
    Fits 305 - 350 CID V-8
    Includes hose and clamp
    Use 9-40671 mounting kit
    OEM 909280, 912441
    Your Price: $157.99
    Save: $104.61
    (39% Off $262.60)
    Part # 9-40101
    Hurry! Only 1 left in stock
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    Manifold - Fits both sides 221, 255, 260, 289, 302 and 351 CID V-8
    Your Price: $205.99
    Save: $63.10
    (23% Off $269.09)
    Part # 9-40612
    No Reviews  |  Write Review  |  Ask Question
    Fits: OMC 4.3L replacement (Osco 1 pc conversion)
    Your Price: $218.78
    Save: $109.00
    (33% Off $327.78)
    Part # T-20898
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    Replaces:
    • Barr # CHVA-1-84
    • Marine Power # 0991-110.
    Your Price: $161.35 (Out of stock)
    Save: $114.33
    (41% Off $275.68)
    Part # T-20902
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    Replaces:
    • OMC #'s 909280 and 912441
    Your Price: $161.35
    Save: $108.65
    (40% Off $270.00)
    Part # T-20903
    No Reviews  |  Write Review  |  Ask Question
    Replaces:
    • OMC #'s 909312 and 908488
    Your Price: $212.87
    Save: $146.13
    (40% Off $359.00)
    Part # T-20905
    No Reviews  |  Write Review  |  Ask Question
    Replaces:
    • Mercruiser # 90880. Cap included.
    Your Price: $173.61
    Save: $102.49
    (37% Off $276.10)
    Part # T-20986
    No Reviews  |  Write Review  |  Ask Question
    Replaces:
    • OMC #'s 914035, 3852374
    • Volvo #'s 3852374-2
    Your Price: $154.07
    Save: $114.10
    (42% Off $268.17)
    Part # T-20997
    No Reviews  |  Write Review  |  Ask Question
    Replaces:
    • Barr # CHV-1-83
    • Marine Power # 0994-000
    Your Price: $179.59
    Save: $95.99
    (34% Off $275.58)
    Part # T-20998
    No Reviews  |  Write Review  |  Ask Question
    Replaces:
    • Barr # FM-1-83
    • Indmar # 53-2008
    Sierra
    Average Customer Review for Exhaust Manifold - 18-1997-1 - Sierra
    Full StarFull StarFull StarFull StarFull Star Based On 1 Review | Write Review
    Full StarFull StarFull StarFull StarFull Starexhaust manifold
    by Jimmie from Hampden, Maine on July 14, 2014
    Went on well and the parts all fit.
    (1 of 1 people found this review helpful)
    Was this review helpful?
    Average Customer Review for Exhaust Manifold - 18-1998-1 - Sierra
    Full StarFull StarFull StarFull StarFull Star Based On 1 Review | Write Review
    Full StarFull StarFull StarFull StarFull Star100
    by John from Sturbridge, Massachusetts on November 11, 2015
    These manifolds wear a direct fit on my 1987 ski centurion. I am so happy with the fast shipping and availability of Iboats thank you
    (0 of 1 people found this review helpful)
    Was this review helpful?
    Q:
    I notice these manifolds only have one Bolt per port. Doesn't seem enough for a good seal. 5.8l Ford 1991?
    A:
    Well this particular manifold can be used for the port or starboard side and it comes with the mounting kit which contains four bolts. This fits: Ford 302 and 351 CID engines, Crusader 302 and 351 CID engines, Interceptor 221, 260, and 289 cid engines, Commander, Mercury, OMC, Palmer, Pleasurecraft & Waukesha.
    Q:
    Will it fit on a 327F 1968 chris craft marine?
    A:
    We do not have a manifold that will work for that engine unfortunately. You will need to contact Chris Craft.
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