Sierra
Crusader Inboard GM Small Block V8 (CM305, CM350HT) Exhaust Manifold Exploded View
Crusader Inboard Exhaust Manifold Exploded View Diagram and Parts
Fits GM Small Block V8 305-350 cu. in.
Models CM305, CM350XL & CM350HT
Figure #DescriptionO.E.M. #Sierra #Application
1MANIFOLD98243 18-1983GM Small Block (V8) 305-351 cu.in. (Port & Starboard)One manifold only but can be used on either the port or starboard side; Use with Manifold Gasket: 18-2949; Mounting Kit: 18-8545
2MANIFOLD GASKET96306 18-2949Use with Manifold: 18-1983
3MOUNTING HARDWAREN/ANSSIncluded in 18-8536 mounting kit.
4HOSE FITTING97296; 97854 18-811290 degree fitting. Thread Size: 1" MPT X 1 1/4"
5HOSE FITTINGN/A 18-44613/4" - 14NPT X 1" Hose (Corrosion Resistant Brass Fitting)
6MOUNTING KITN/A 18-8546Use with 4" Spacer: 18-1984. Includes (2) 18-0475 gasket
7BLACKSTEEL PLUG113186 18-4258Thread Size: 3/4" MPT X 1". Use with Spacer: 18-1984
8MANIFOLD SPACER98128 18-1984Spacer for Manifold: 18-1983. Use with Mounting Kit: 18-8546
9ELBOW GASKET (BLOCKED)98127 18-0475Blocked gasket for universal elbow; Use with Riser: 18-1938
10ELBOW GASKET (S/S PLATE )98124 18-0476Used with Spacer: 18-1984. Requires (2) 18-0475 for each 18-0476
11MOUNTING BOLTN/ANSSIncluded in 18-8547 mounting kit.
12RISER98126 18-1938Use with Manifold: 18-1983; Riser Gasket: 18-0475; Mounting Kit: 18-8547
13MOUNTING KITN/A 18-8547Use with Riser: 18-1938
14MOUNTING KITN/A 18-8536Use with Manifold: 18-1983
15EXHAUST MANIFOLD GASKET SETN/A 18-0604Use with Manifold: 18-1983
Average Customer Review for Mercruiser Manifold Spacer - H2O
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Mer cruiser spacer
by Ian from Tacoma, Washington on September 13, 2016
Wrong product, your customer service person Travis was great but the H2O catalog was terrible. It was returned.
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Q:
PART T-20939 iS THE BOTTOM BLOCKED OR OPEN CAN IT BE USED ON A BLOCKED BOTTOM CAN i GET A PIC OF BOTTOM?
A:
It is open. We don't have a picture, but we can send you one by contacting us at the number at the top of the page.


Q:
The Volvo OEM part?
A:
Replaces Volvo OEM #'s: 835966 & 856034.


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Price: $4.94
Save: $3.05
(38% Off $7.99)
Part # 18-0476
2nd Day Air for $2 More Eligible
SHIPS TODAY!* if ordered in 9 hrs 30 mins.
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Blocked
Replaces OEM part #
  • BARR 01-0105
Fits:
  • Barr, Indmar & Marine Power Ford Small Block V8 302-351 cu.in.

Used with:
  • Riser: 18-1939
  • Riser: 18-1907
  • Manifold: 18-1898
  • Elbow: 18-1999
Included in 18-8535 mounting kit

Sierra part # 18-0476 riser block gaskets

The gaskets are constructed of a proven hi-temperature composite that does not contain asbestos materials. This gasket material has been designed to handle the high temperatures capable of exceeding 500 degrees Fahrenheit as well as harsh marine environments.

Each Sierra riser block-off gasket ensures the factory matched footprint of exhaust ports. The Typical thickness for these products can range up to 1/16". Be certain to thoroughly clean and remove the entire old gasket. When joining two non-machined surfaces, an exact match is not always possible. It is recommended that you use a thin layer of high-temperature silicone sealer on both sides of gasket prior to installation to create a more perfect reliable seal.
Price: $19.71
Save: $9.28
(32% Off $28.99)
Part # 18-0604
2nd Day Air for $2 More Eligible
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For: GM 305/350 CID Engine
Use with:
    Manifold 18-1997-1
Applies for Indmar
Price: $37.14
Save: $21.44
(36% Off $58.58)
Part # 18-8112
2nd Day Air for $2 More Eligible
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For:
Gm Small Block V8 305-350 cu. in. ( Models 220, 270, CM305, CM350XL, CM350HT )
GM Big Block V8 454 cu. in. ( Models: 454XL, 502XL, CH350, 454XL )

Use with:
Manifold: 18-1997-1, 18-1998-1, 18-1892, 18-1983, 18-1929, 18-1933, 18-1925, 18-1926, 18-1898

Replaces OEM part #
  • CRUSADER 97854
Price: $11.15
Save: $4.48
(28% Off $15.63)
Part # 18-4461
2nd Day Air for $2 More Eligible
SHIPS TODAY!* if ordered in 9 hrs 30 mins.
Hurry! Only 1 left in stock
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Replaces OEM part #
  • MERCURY MARINE 22-807155
3/4" - 14 NPT X 1" Hose
Corrosion Resistant Brass Fitting
Price: $21.87
Save: $6.11
(21% Off $27.98)
Part # 18-2949-9
2nd Day Air for $2 More Eligible
SHIPS TODAY!* if ordered in 9 hrs 30 mins.
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Pkg of 2
Replaces OEM part #
  • CRUSADER 96306
  • BARR CHV-47-000
  • VOLVO 835966-3
  • VOLVO 856034-4
  • MERCURY MARINE 27-33395
  • MERCURY MARINE 27-33395B

Use with:
  • 18-1931-1: Manifold
  • 18-1986-1: Manifold
  • 18-1997-1: Manifold
  • 18-1902: Manifold
  • 18-1903: Manifold
  • 18-1904: Manifold
  • 18-1914: Manifold
  • 18-1925: Manifold
  • 18-1926: Manifold
  • 18-1950-1: Manifold
  • 18-1951-1: Manifold
  • 18-1953-2: Manifold
For:
  • AQ200, 225, 260, 271, 290, 311, V-8

Price: $119.73
Save: $93.76
(43% Off $213.49)
Part # 18-1984
2nd Day Air for $2 More Eligible
SHIPS TODAY!* if ordered in 9 hrs 30 mins.
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For: GM Small BLock V8 305-350 cu. in.
GM Big Block V8

Use with:
Mounting Kit: 18-8546

Replaces OEM part #
  • CRUSADER 98128
Price: $6.51
Save: $3.48
(34% Off $9.99)
Part # 18-0475
2nd Day Air for $2 More Eligible
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Blocked gasket for universal elbow 18-1999
Used with:
  • Manifold 18-1938
Price: $22.53
Save: $10.46
(31% Off $32.99)
Part # 18-8536
2nd Day Air for $2 More Eligible
SHIPS TODAY!* if ordered in 9 hrs 30 mins.
Hurry! Only 1 left in stock
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Replaces OEM part #
  • INDMAR 53-1027
  • MARINE POWER 0994-000
  • BARR CHV-1-83
For:
  • Barr, Indmar and Marine Power GM Small Block V8 305-350 cu. in.
Used with:

  • Manifold: 18-1997-1
Price: $195.83
Save: $127.66
(39% Off $323.49)
Part # 18-1938
SHIPS TODAY!* if ordered in 9 hrs 30 mins.
No Reviews
Replaces OEM part #
  • CRUSADER RO29015
  • CRUSADER 98126
Price: $19.68
Save: $2.81
(12% Off $22.49)
Part # 18-8547
2nd Day Air for $2 More Eligible
SHIPS TODAY!* if ordered in 9 hrs 30 mins.
Hurry! Only 1 left in stock
No Reviews
For:
  • GM SB V8 305-350 cu. in.
  • GM BB V 454 cu. in.
Used with:
  • Riser: 18-1938
Price: $3.60
Save: $1.39
(27% Off $4.99)
Part # 18-4258
2nd Day Air for $2 More Eligible
SHIPS TODAY!* if ordered in 9 hrs 30 mins.
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Thread Size 3/4"
Blacksteel Plug
18-9004 - Pipe Sealant with Teflon is recommended for use on plug threads
Use with Manifold Spacer: 18-1949

Replaces OEM part #
  • MERCURY MARINE 22-41622
  • MERCURY MARINE 22-33198A1
Price: $221.90
Save: $156.98
(41% Off $378.88)
Part # 18-1983
SHIPS TODAY!* if ordered in 9 hrs 30 mins.
Hurry! Only 1 left in stock
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Port & Starboard: One manifold only but can be used on either the port or starboard side

Use with:
Exhaust Manifold Gasket: 18-2949
Mounting Kit: 18-8545

For: GM Small Block V-8 305-350 ci

Replaces OEM part #
  • CRUSADER 98243
Price: $41.99
Discontinued
Save: $13.15
(23% Off $55.14)
Part # 9-40418
2nd Day Air for $2 More Eligible
No Reviews
Water Fitting
90° elbow - 1" NPT x 1 1/4" hose barb
OEM 97854
One required for open (fresh water) cooled manifolds - Two required for closed cooled manifolds
(Discontinued)
Price: $185.99
Discontinued
Save: $43.96
(19% Off $229.95)
Part # 9-40419
No Reviews
Riser
4" Exhaust outlet
10° down angle
Use mounting kit 9-40479
Crusader low profile riser 98126 (6 3/4" high) is replaced by 9-40419 (8 1/4" high)
OEM RO29015, 98126
(Discontinued)
Price: $118.45
Save: $75.55
(38% Off $194.00)
Part # T-20939
2nd Day Air for $2 More Eligible
SHIPS TODAY!* if ordered in 9 hrs 30 mins.
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Barr and Marine Power Riser, 4" Outlet, 10° down angle.


Replaces:

  • Barr # 20-0100
  • Marine Power # 0992-593

Engine Type:
Ford Small Block V8 302-351 cu.inGM Small Block V8 305-350 cu.in.GM Big Block V8 454 cu.in.


Engine Model:
Universal fit

Price: $103.73
Save: $76.96
(42% Off $180.69)
Part # T-30984
2nd Day Air for $2 More Eligible
SHIPS TODAY!* if ordered in 9 hrs 30 mins.
No Reviews

Crusader Spacer, 4"


Replaces OEM #:

  • Crusader 98128

Engine Type:
GM Small Block V8 305-350 cu.in.GM Big Block V8 454 cu.in.


Engine Model:
220 and 270
454XL and 502XL

Price: $85.97
Save: $78.03
(47% Off $164.00)
Part # T-20985
2nd Day Air for $2 More Eligible
SHIPS TODAY!* if ordered in 9 hrs 30 mins.
Hurry! Only 1 left in stock

Mercruiser Spacer, 6" center riser.


Replaces OEM #:

  • Mercruiser # 93322

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


Fits H2O Manifolds: T-20952/ T-20953/ T-20957.