18-1986-1 Manifold
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SIERRA18-1986-1 Manifold


In stock online.
Model # 14122055 | Mfg # 18-1986-1UPC # 808282284954
18-1986-1 Manifold




18-1986-1 Manifold

Name Value
Compatibility OMC Stern Drive
Volvo Penta
Material Cast Iron
Type Manifolds

Product Overview

Replace freeze damaged or corroded small block v8 exhaust manifolds

For 50 years Sierra has been producing parts engineered to meet or exceed the specifications of marine engine manufacturers and has gained the confidence of engine manufacturers and boat builders to a point of supplying them with OEM parts. Boaters and technicians can be assured a Sierra part will fit right the first time and restore function to OEM specifications.

Sierra manifold kits include all you will need to for a quick installation. Each manifold is an exact OEM match and leak tested. Mating surfaces are CNC machined to provide the best possible seal without additional preparation. The castings are primed and painted to stand up to the marine environment.

Key Features

  • Meets or exceeds manufacturer specifications
  • Manifold can be used on port or starboard side
  • Includes Manifold, plugs, and drain
  • Compatible with GM based 305, 350, and 377 V-8s used in many Volvo Penta applicaitons
  • Use with Manifold Gasket:18-2949; Mounting Kit: 18-8502
  • Backed by SeaStar Solutions Limited Two-Year Warranty

The Sierra Engine Parts Selector

In addition to exhaust manifolds, we offer a wide variety of other engine parts manufactured by Sierra. To see if we have the part you need, see our Engine Parts Selector, where you can search by engine make, serial number and model or year of manufacture.



ApplicationOEM Part Number
BarrOMC 1 914035
OMC Stern Drive3857723, 3852374
Volvo Penta3852374-2, 3847501, 3857723


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