18-1976-1 Riser with 7° 4" OD Nipple for V6, V8 Applications

Replace freeze damaged or corroded exhaust risers easily with a complete installation kit
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 riser kits include all you will need to for a quick installation. Each riser is an exact OEM match and is leak tested for quality assurance. Mating surfaces are CNC machined to provide the best possible seal without additional preparation. Precision castings feature uniform wall thickness and are primed and painted to stand up to the marine environment. Look no further than a Sierra kit for quick out of the box installation.
Key Features
- Meets or exceeds manufacturer specifications
- 7° angle riser for 4" exhaust applications
- Risers can be used on port or starboard side
- Recommended for saltwater use
- Complete kit includes riser, exhaust manifold gaskets, plugs and bolts
- Compatible with MCM/MIE GM based V-6 and V-8 engines manufactured after 2002 with center rise outlet exhaust manifolds
- 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.
Application | OEM Part Number |
---|---|
Barr | MC-20-44354 |
GLM | 51140 |
HGE | 4354 |
Mallory | 9-40559 |
MerCruiser Sterndrive | 44354A3, 807914A1, 44354A9, 44354A10, 44354A13, 807988A2, 807988A03 |
Osco | 4354 |
Review Snapshot
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Reviewed by 4 customers
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Verified Buyer
Submitted as part of a sweepstakes entry
For my boat, it was in good condition came with all hardware made the job easy to assemble.
Sierra riser for mercruiser v8
Verified Buyer
Comments about 18-1976-1 Riser with 7° 4" OD Nipple for V6, V8 Applications by Sierra | Exhaust at West Marine
Needed to be replaced after 15 years of boating. The Sierra brand was a perfect fit and was installed easily .
Worked flawlessly, especially on a 1990 boat.
Verified Buyer
Comments about 18-1976-1 Riser with 7° 4" OD Nipple for V6, V8 Applications by Sierra | Exhaust at West Marine
My boat is a 1990 and I was worried I wouldn't be able to find the correct part. Service at W.M. Was great and the part worked flawlessly.
Fits
Verified Buyer
Comments about 18-1976-1 Riser with 7° 4" OD Nipple for V6, V8 Applications by Sierra | Exhaust at West Marine
The unit fits and comes with all fittings, plugs and gaskets. The downside is that you will need to remove the paint from the surface of the joint that connects to the exhaust manifold. I used a wore brush to scrape off the paint. Takes about 15 minutes...but it will properly create a shiny and smooth surface ready for gasket and sealer.
Q&A
Showing 1 out of 1 Questions
- Q
Does this fit a 93 Mailiby Mercruiser 350 Comp ski? IN board. direct drive.
- Asked by Chantz
- Verified Reply - Customer ServiceThe Sierra catalog says that the part number 18-1976-1 Riser fits most Mercruiser V6 & V8 Applications. Replaces Mercruiser part numbers 44354A3, 807914A and 807988A2.Was this answer helpful to you