Refine Parts List
Model :

Model

Exhaust Manifold

Exhaust Manifold

Manifold Mounting Kits

Manifold Gasket

AQ120B 18-1930-1 T-20930 18-8539 18-2991
AQ125A 18-1930-1 T-20930 18-8539 18-2991
AQ131B 18-1930-1 T-20930 18-8539 18-2991
AQ131C 18-1930-1 T-20930 18-8539 18-2991
AQ131D 18-1930-1 T-20930 18-8539 18-2991
AQ140A 18-1930-1 T-20930 18-8539 18-2991
AQ145A 18-1930-1 T-20930 18-8539 18-2991
AQ145B 18-1930-1 T-20930 18-8539 18-2991
AQ151A 18-1930-1 T-20930 18-8539 18-2991
AQ151B 18-1930-1 T-20930 18-8539 18-2991
AQ151C 18-1930-1 T-20930 18-8539 18-2991
AQ200C 18-1931-1 T-20931 18-8511 18-2949
AQ200D 18-1931-1 T-20931 18-8511 18-2949
AQ200F 18-1931-1 T-20931 18-8511 18-2949
AQ225C 18-1931-1 T-20931 18-8511 18-2949
AQ225D 18-1931-1 T-20931 18-8511 18-2949
AQ225E 18-1931-1 T-20931 18-8511 18-2949
AQ225F 18-1931-1 T-20931 18-8511 18-2949
AQ255A 18-1931-1 T-20931 18-8511 18-2949
AQ255B 18-1931-1 T-20931 18-8511 18-2949
AQ260A 18-1931-1 T-20931 18-8511 18-2949
AQ260B 18-1931-1 T-20931 18-8511 18-2949
AQ290A 18-1931-1 T-20931 18-8511 18-2949
AQ430 18-1932 --18-2909
AQ431 18-1932 --18-2909
AQ432 18-1932 --18-2909
AQ434 18-1932 --18-2909
BB140A 18-1930-1 T-20930 18-8539 18-2991
BB145A 18-1930-1 T-20930 18-8539 18-2991
BB225A 18-1931-1 T-20931 18-8511 18-2949
BB225B 18-1931-1 T-20931 18-8511 18-2949
BB225C 18-1931-1 T-20931 18-8511 18-2949
BB260A 18-1931-1 T-20931 18-8511 18-2949
BB260B 18-1931-1 T-20931 18-8511 18-2949
BB260C 18-1931-1 T-20931 18-8511 18-2949
230 18-1930-1 T-20930 18-8539 18-2991
250 18-1930-1 T-20930 18-8539 18-2991
500B ---18-2909
501B ---18-2909
570 ---18-2909
572 ---18-2909
740B ---18-2909
LK 4.3L ---18-2909
LK 5.7L 18-1986-1 T-20986 18-8502 18-2949
LK 5.7L 18-1986-1 T-20986 18-8502 18-2949
HU 5.7 Gi 18-1986-1 T-20986 18-8502 18-2949
HU 5.7 Gi 18-1986-1 T-20986 18-8502 18-2949
MD 5.7GL 18-1986-1 T-20986 18-8502 18-2949
MD 5.7GL 18-1986-1 T-20986 18-8502 18-2949
MD 5.7Gi 18-1986-1 T-20986 18-8502 18-2949
MD 5.7Gi 18-1986-1 T-20986 18-8502 18-2949
NC5.7 GL 18-1986-1 T-20986 18-8502 18-2949
NC5.7 GL 18-1986-1 T-20986 18-8502 18-2949
NC5.7Gi 18-1986-1 T-20986 18-8502 18-2949
NC5.7Gi 18-1986-1 T-20986 18-8502 18-2949

Model

Exhaust Manifold

Exhaust Manifold

Manifold Mounting Kits

Manifold Gasket

Refine Parts List
Model :
Price: $433.72
Discontinued
Save: $94.27
(17% Off $527.99)
Part # 18-1898
(Discontinued)
Price: $337.95
Discontinued
Save: $178.04
(34% Off $515.99)
Part # 18-1930-2
(Discontinued)
Price: $266.53
Discontinued
Save: $146.46
(35% Off $412.99)
Part # 18-1931-1
(Discontinued)
Price: $257.44
Discontinued
Save: $141.55
(35% Off $398.99)
Part # 18-1932
No Reviews
(Discontinued)
Price: $266.63
Save: $58.05
(17% Off $324.68)
Part # 18-1997-1
SHIPS TOMORROW!* if ordered in 19 hrs 20 mins.
Price: $331.66
Discontinued
Save: $182.33
(35% Off $513.99)
Part # 18-1986-1
(Discontinued)
Exhaust Manifold - Sierra
View Larger Photo
Representative Photo
Price: $302.88
Discontinued
Save: $166.11
(35% Off $468.99)
Part # 18-1848
(Discontinued)
4 Cylinder Exhaust Manifold, OMC/ Volvo - GLM
Price: $355.82
Save: $142.32
(28% Off $498.14)
Part # 51450
V-6 Cylinder Exhaust Manifold, OMC/ Volvo - GLM
Price: $265.52
Save: $106.20
(28% Off $371.72)
Part # 51480
No Reviews
Price: $254.09
Save: $101.63
(28% Off $355.72)
Part # 51490
No Reviews
V-8 BB Exhaust Manifold, OMC/ Volvo - GLM
Price: $310.46
Save: $124.18
(28% Off $434.64)
Part # 51500
No Reviews
V-8 SB Exhaust Manifold, Volvo - GLM
Price: $207.80
Save: $109.19
(34% Off $316.99)
Part # 51630
No Reviews
Sierra
Average Customer Review for Sierra 18-1930-2 Exhaust Manifold
Full StarFull StarEmpty StarEmpty StarEmpty Star
Based On 2 Reviews | Write Review
Full StarEmpty StarEmpty StarEmpty StarEmpty Star
THE PICTURE IS WRONG
by Alfred from Gorham, New Hampshire on June 18, 2017
WHAT THE PICTURE SHOWS IS NOT THE SAME AS THE ITEM I GOT
Was this review helpful?
Full StarFull StarFull StarEmpty StarEmpty Star
Check threads
by Jeffrey from Bremerton, Washington on April 15, 2015
The manifold feels solid and should work great. Before installing make sure you check all of the threaded holes for the cooling system. The mounting holes for the heat exchanger were a different size than what was on my boat originally, so you may have to buy new hardware or tap the holes. Also, the hole on the front end for the plug wasn't cut deep enough for even the shallowest flush plug I could find, so I had to buy a large tap to make that hole bigger. All of this would have been much easier if I had checked before mounting and had to pull back off.
(1 of 1 people found this review helpful)
Was this review helpful?
Average Customer Review for Exhaust Manifold - 18-1931-1 - Sierra
Full StarFull StarFull StarEmpty StarEmpty Star
Based On 1 Review | Write Review
Full StarFull StarFull StarEmpty StarEmpty Star
Don't forget the hose nipples
by Eric from Sandy, Utah on June 16, 2011
The manifolds fit great. Sierra needs to include the hose nipples in with the mounting kit. There are threaded holes on either end of the manifold and the kit only comes with the drain plug. I was unable to remove the hose nipples from my original manifolds, and was unable to find the part locally. I had to go to an industrial hose supply company to fabricate the part. If you don't want to go through all that trouble make sure you purchase the hose nipples from the Volvo Penta parts area on iboats.com
(8 of 10 people found this review helpful)
Was this review helpful?
Average Customer Review for Exhaust Manifold - 18-1997-1 - Sierra
Full StarFull StarFull StarFull StarFull Star
Based On 1 Review | Write Review
Full StarFull StarFull StarFull StarFull Star
exhaust manifold
by Jimmie from Hampden, Maine on July 14, 2014
Went on well and the parts all fit.
(1 of 1 people found this review helpful)
Was this review helpful?
Q:
I have a 3.0 liter 1992 omc cobra engine where my exhaust manifold is leaking. This product appears to fit my motor but the part number on the current manifold reads 986984. Will this product still work on my engine?
A:
Not sure what the 986984 number is, it may be a casting number, but yes this will work with your application.


Q:
Will it fit on a 327F 1968 chris craft marine?
A:
We do not have a manifold that will work for that engine unfortunately. You will need to contact Chris Craft.


Q:
Is this sold as set or individual?
A:
This is sold as an individual manifold.


Q:
How to find out what manifolds fit for my boat?
A:
It is determined by the model or serial number of the engine.


Q:
How do I know what manifolds and risers and gaskets and hardware I need for my boat?
A:
It is determined by the model or serial number of the engine.


Ask a question
Question & Answer Guidelines
This product ships in 1 to 5 business days.
Add to Cart and enter your Postal Code to determine the shipping charges.
Most products and orders leave our warehouse in 1 business day. However, select items may take more processing time. Alaska and Hawaii orders please add 1 additional warehouse processing day.
Standard Shipping Policies