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GM Big block Replacement Generic Exhaust Manifolds and Risers,
These will most Big Block Chevy 454 Marine engines


Manifold. Fits 396, 427 and 454 cu.in. GM big block V8 Engines
Osco CWCRManifold. Fits 396, 427 and 454 cu.in. GM big block V8 Engines
Osco CWCR818 Manifold. Fits 396, 427 and 454 cu.in. GM big block V8 Engines. Fits both sides of engine. Use mounting kit CWCR-MK.
 
Base SKU:OSCCWCR818
In Stock:Yes
Price: $231.00 
 
Quantity:   

Riser, 3" exhaust outlet, 30º down angle.
Osco CRR-3 Riser, 3" exhaust outlet, 30º down angle.
Osco Motors CRR-3 Riser, 3" exhaust outlet, 30º down angle. Use mounting kit CRR-MK or CRR-MK-FW.Fits FLCR818, CVCCR818 AND CWCR818 MANIFOLDS
 
Base SKU:OSCCRR-3
In Stock:No
Price: $138.25 
 
Quantity:   

Riser, 3" exhaust outlet, 10º down angle
Osco CRR-1 Riser, 3" exhaust outlet, 10º down angle
Osco CRR-1 Riser, 3" exhaust outlet, 10º down angle. Use mounting kit CRR-MK or CRR-MK-FW.Fits FLCR818, CVCCR818 AND CWCR818 MANIFOLDS. Please reference BAR-20-0082
No Longer Available
 
Base SKU:OSCCRR-1
In Stock:No
Price: $0.00 
 
Quantity:   

SPACER 4"
SPACER 4" Fits FLCR818, CVCCR818 AND CWCR818 MANIFOLDS
Osco Spacer, 4". Use mounting kit CRR-MK or CRR-MK-FW. Risers will need their own mounting kit.Fits FLCR818, CVCCR818 AND CWCR818 MANIFOLDS
 
Base SKU:OSCCRR-14S
In Stock:No
Price: $0.00 
 
Quantity:   

Mounting Kit, manifold. Fits CWCR818 manifold.
Mounting Kit, manifold. Fits CWCR818 manifold.
Osco CWCR-MK Mounting Kit, manifold. Fits CWCR818 manifold. Includes CW-GH gasket and mounting hardware.
 
Base SKU:OSCCWCR-MK
In Stock:Yes
Price: $17.47 
 
Quantity:   

Mounting Kit, risers and spacer. Fits CRR-1 and CRR-3 risers and CRR-14S spacer
Mounting Kit, risers and spacer. Fits CRR-1 and CRR-3 risers and CRR-14S spacer
Osco CRR-MK Mounting Kit, risers and spacer. Fits CRR-1 and CRR-3 risers and CRR-14S spacer. For raw water cooled manifolds. Includes CRR-G gasket and mounting hardware.
 
Base SKU:OSCCRR-MK
In Stock:No
Price: $8.80 
 
Quantity:   

Mounting Kit, risers and spacer. Fits CRR-1 and CRR-3 risers and CRR-14S spacer.
Mounting Kit, risers and spacer. Fits CRR-1 and CRR-3 risers and CRR-14S spacer.
Osco CRR-MK-FW Mounting Kit, risers and spacer. Fits CRR-1 and CRR-3 risers and CRR-14S spacer. For closed cooled or recirculated manifolds. Includes CRR-G-FW gasket and mounting hardware.
 
Base SKU:OSCCRR-MK-FW
In Stock:No
Price: $0.00 
 
Quantity:   

PLATE-V8 STAINLESS STEEL
PLATE-V8 STAINLESS STEEL
Osco CRR-G-SP Stainless Plate. Use with two CRR-G gaskets. Blocks water flow from manifold to riser or spacer. Fits CRR-1 and CRR-3 risers and CRR-14S spacer
 
Base SKU:OSCCRR-G-SP
In Stock:Yes
Price: $11.31 
 
Quantity:   

Gasket, riser to manifold. Blocks cooling water
Gasket, riser to manifold. Blocks cooling water
Osco CRR-G-FW Gasket, riser to manifold. Blocks cooling water from passing from manifold to riser or spacer. Included in CRR-MK-FW.

This Item is NLA
 
Base SKU:OSCCRR-G-FW
In Stock:No
Price: $8.80 
 
Quantity:   

Gasket, riser and spacer to manifold
Gasket, riser and spacer to manifold
Osco CRR-G Gasket, riser and spacer to manifold. Allows cooling water to pass from manifold to riser or spacer.Included in CRR-MK.Fits CRR-1 and CRR-3 risers and CRR-14S spacer.
 
Base SKU:OSCCRR-G
In Stock:Yes
Price: $7.00 
 
Quantity:   

FITTING 3/4"PIPE X1"THREAD 90D
FITTING 3/4"PIPE X1"THREAD 90D
Water Fitting, 90º elbow. 3/4" MPT x 1" hose barb. Replaces Mercruiser # 22-36305. Fits Chrysler , Mercruiser Manifolds and Risers
 
Base SKU:OSCF68C9
In Stock:No
Price: $0.00 
 
Quantity:   

WATER FITTING 3/4" STRAIGHT
WATER FITTING 3/4" STRAIGHT
Water Fitting, straight. 3/4" MPT x 1" hose barb. Replaces Mercruiser # 22-45084. Replaces Crusader # 97911 Fits Chrysler Mercruiser Crusader manifolds and risers
 
Base SKU:OSCF68CS
In Stock:No
Price: $0.00 
 
Quantity:   

FITTING 3/4" MPT X 3/4" H
WATER FITTING STRAIGHT 3/4" MPT X 3/4" HOSE
Water Fitting, straight. 3/4" MPT x 1" hose barb. For 106-T, 826 and 5639.
 
Base SKU:OSCF66CS
In Stock:Yes
Price: $9.50 
 
Quantity:   


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