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Sierra 18-1903 OMC Marine Exhaust Manifold Chevy Cobra V8 912442 909279 Port
By Sierra
Part #18-1903
WarrantyLimited Lifetime
Made InTaiwan
Shipping Wt34 lbs

$316.86 US

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5 in stock
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Product Description

Sierra 18-1903 marine port exhaust manifold for OMC Cobra V8 5.0L and 5.7L (305 and 350 cu in) V8 marine gas engines. GM/Chevrolet small block. Fits many OMC 1989 and earlier models with log style (end rise) manifolds. Comes with gasket set. Each purchase is for one port-side manifold. Find the starboard side here.

Riser mating bolt dimensions are 3-7/8" (98.4mm) by 2-19/32" (65.9mm) bolt center-to-center.

This part is new and high-quality cast iron construction. To determine if this is the correct replacement for you, look on your current part for casting numbers and match them to the cross reference below:

Cross ReferencePart Number
OMC912442, 909279, 910144
Osco Motors2442
Barr MarineOMC-1-912442
Sierra Marine18-1903
Aqua Power5513
GLM Products51420

About Sierra
Sierra provides premium-quality aftermarket replacements for over 6,000 marine parts, tools, and components. Sierra products are engineered to meet or exceed OEM standards, and stand up in harsh marine environments. Every new Sierra part comes with a limited lifetime warranty that covers the useful life of the product against any defects in workmanship and materials.
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$316.86 US

Free Shipping to the Lower 48 US States
(See all shipping options in cart)
5 in stock
Pay in 4 interest-free payments with

Product Specifics

BrandSierra
Made InTaiwan
FitsOMC Cobra V8 Port Side
Item Weight31.5 lbs
ManufacturerSierra
Manufacturer #18-1903
MaterialCast Iron
Part #18-1903
Product TypeExhaust Manifold
Replaces912442, 909279, 910144
Shipping Dims21" x 9" x 7"
Shipping Wt34 lbs
UPC030999620910
WarrantyLimited Lifetime

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