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Model

Serial Number

Exhaust Manifold Elbow

Exhaust Manifold Elbow

Elbow Gasket

120 1666601 - 2046624 ---
120 2046625 - 2324346 18-1973 -18-2819
120 2324347 - 3377340 18-1973 -18-2819
120 3377341 - 5192408 18-1973 -18-2819
120 5192049 - 6229717 18-1973 -18-2819
120/2.5L 6229718 & up 18-1972 -18-2833
140(4Cyl) 2508261 - 3332137 18-1971 T-20971 18-2833
140(4Cyl) 3332138 - 5157668 18-1971 T-20971 18-2833
140(4Cyl) 5157669 - 6229717 18-1971 T-20971 18-2833
140/3.0L 6229718 & up 18-1972 -18-2833
3.0L/3.0LX C856559 - F603999 18-1975 -18-2833
140(6Cyl) 1538930 - 1725960 ---
150 1666495 - 2048046 ---
160 2048022 - 2770031 18-1973 --
165 2770032 & up 18-1971 T-20971 18-2833
165/170/[3.7]L 6916779 & up ---
180/190/[3.7]LX 6916779 & up ---
175/4.3L (262 CID) B527955 & up --18-0897
175/4.3L (262 CID) B527955 & up --18-0897
4.3L (GEN II) D714107 & up --18-0897
4.3L (GEN II) D714107 & up --18-0897
4.3L (GEN II) F000878 & up --18-0897
4.3L (GEN II) F000878 & up --18-0897
185 (229 CID) 6330183 & up --18-0897
185 (229 CID) 6330183 & up --18-0897
185 (262 CID) A331455 & up --18-0897
185 (262 CID) A331455 & up --18-0897
200 2453769 - 2712072 18-1971 T-20971 18-2833
200-GM 6218462 & up --18-0897
200-GM 6218462 & up --18-0897
200/5.0L(GM) B525982 & up --18-0897
200/5.0L(GM) B525982 & up --18-0897
205 (262 CID) A331455 & up --18-0897
205 (262 CID) A331455 & up --18-0897
205/4.3L-LX B527955 & up --18-0897
205/4.3L-LX B527955 & up --18-0897
4.3LX(GEN II) D714370 & up --18-0897
4.3LX(GEN II) D714370 & up --18-0897
4.3LX(GEN II) F001220 & up --18-0897
4.3LX(GEN II) F001220 & up --18-0897
215-FORD 2781153 & up 18-1971 T-20971 18-2833
215-FORD 2781153 & up 18-1971 T-20971 18-2833
225-FORD 3385721 & up N/A -18-2833
225-FORD 3385721 & up 18-1971 T-20971 18-2833
225-S (FORD) 3385721 & up 18-1971 T-20971 18-2833
225-S (FORD) 3385721 & up 18-1971 T-20971 18-2833
225-GM 1539620 - 2278646 ---
225-GM 1539620 - 2278646 ---
225-GM 2278647 - 2694014 ---
228-GM 4765100 - 4888929 --18-0885
228-GM 4888930 - 5170008 18-1971 T-20971 18-2833
228-GM 4888930 - 5170008 18-1971 T-20971 18-2833
228-GM 5170009 - 6218461 --18-2833
228-GM 5170009 - 6218461 --18-2833
228-GM 6218462 & up --18-0897
228-GM 6218462 & up --18-0897
230-GM (IMBRD) 5907058 & up --18-0897
230-GM (IMBRD) 5907058 & up --18-0897
230/5.0 GM (IB) B522506 & up --18-0897
230/5.0 GM (IB) B522506 & up --18-0897
230-GM 6218462 & up --18-0897
230-GM 6218462 & up --18-0897
230/5.0L-LX (GM) B525982 & up --18-0897
230/5.0L-LX (GM) B525982 & up --18-0897
233-FORD 4173000 & up --18-2833
233-FORD 4173000 & up 18-1971 T-20971 18-2833
250-GM 2314301 - 2639854 --18-0885
250-GM 4768860 - 4908849 18-1971 T-20971 18-2833
250-GM 4768860 - 4908849 18-1971 T-20971 18-2833
255-FORD 3258728 & up 18-1971 T-20971 18-2833
255-FORD 3258728 & up 18-1971 T-20971 18-2833
255-GM 4175500 - 4499060 --18-0885
255-GM 4499061 - 5195908 18-1971 T-20971 18-2833
255-GM 4499061 - 5195908 18-1971 T-20971 18-2833
255-GM 5195909 & up --18-0885
255-GM 5195909 & up --18-0885
260-GM 4908850 - 6218461 18-1971 T-20971 18-2833
260-GM 4908850 - 6218461 18-1971 T-20971 18-2833
260-GM 6218462 & up --18-0897
260-GM 6218462 & up --18-0897
260/5.7L (GM) B525982 & up --18-0897
260/5.7L (GM) B525982 & up --18-0897
260-GM (INBRD) 5907058 & up --18-0897
260-GM (INBRD) 5907058 & up --18-0897
260/5.7 GM (IB) B588506 & up --18-0897
260/5.7 GM (IB) B588506 & up --18-0897
270-GM 2851074 - 3077735 --18-0885
280-GM 4176250 & up --18-0885
300MR/TRS (GM) 6668677 & up --18-2849
300MR/TRS (GM) 6668677 & up --18-2849
320-GM (EFI) A543604 & up --18-2849
320-GM (EFI) A543604 & up --18-2849
320-GM (EFI) B157603 & up --18-2849
320-GM (EFI) B157603 & up --18-2849
325-GM 2313965 - 3042730 --18-0885
325-GM 3042731 & up --18-0885
330-GM 4623115 & up --18-0885
330-GM/ 6083145 & up --18-0897
340/7.4L-GM 5889914 & up --18-0897
340/7.4L-GM 5889914 & up --18-0897
350-GM 3780450 & up --18-0885
350-GM (Mag) A635178 & up --18-0897
350-GM (Mag) A635178 & up --18-0897
350-GM (Mag) B525982 & up --18-0897
350-GM (Mag) B525982 & up --18-0897
350 (Mag-Trn.Ski) D505450 & up --18-0897
350 (Mag-Trn.Ski) D505450 & up --18-0897
370 TRS-GM 4179554 & up --18-0885
370 TRS-GM 6721528 & up --18-2849
370 TRS-GM 6721528 & up --18-2849
390-GM 2781129 - 2825059 --18-0885
400 TRS-GM 4179554 & up --18-0885
420-GM A398941 & up ---
425-GM A398941 & up ---
440 TRS-GM 4179554 & up --18-0885
454-GM (Mag) A631894 & up --18-0897
454-GM (Mag) A631894 & up --18-0897
454 Mag Bravo (GM) B721206 & up --18-0897
454 Mag Bravo (GM) B721206 & up --18-0897
454 Mag Bravo (Gen V) D805069 & up --18-0897
454 Mag Bravo (Gen V) D805069 & up --18-0897
460 TRS-GM 4179554 & up --18-0885
465 C849992 & up ---
470 4208730 - 5520114 18-1971 T-20971 18-2833
470 4208730 - 5520114 18-1971 T-20971 18-2833
470 5520115 - 6218036 18-1972 -18-2833
500 C577254 & up ---
502 Mag Bravo (GM) C878221 & up --18-0897
502 Mag Bravo (GM) C878221 & up --18-0897
502 Mag Bravo (Gen V) D824589 & up --18-0897
502 Mag Bravo (Gen V) D824589 & up --18-0897
502 EFI D840650 & up --18-0897
502 EFI D840650 & up --18-0897
525 D456000 & up ---
888-FORD 3108723 & up 18-1971 T-20971 18-2833
888-FORD 3108723 & up 18-1971 T-20971 18-2833
898/198-GM 4762210 - 6218461 18-1971 T-20971 18-2833
898/198-GM 4762210 - 6218461 18-1971 T-20971 18-2833
898-GM 6218462 & up --18-0897
898-GM 6218462 & up --18-0897
5.7-GM (Ski) A338553 & up --18-0897
5.7-GM (Ski) A338553 & up --18-0897
5.7-GM (Ski) B514627 & up --18-0897
5.7-GM (Ski) B514627 & up --18-0897
5.7-GM (Ski) B525982 & up --18-0897
5.7-GM (Ski) B525982 & up --18-0897
7.4L Bravo (GM) B771113 & up --18-0897
7.4L Bravo (GM) B771113 & up --18-0897
7.4L Mag Bravo (Gen V) D603118 & up --18-0897
7.4L Mag Bravo (Gen V) D603118 & up --18-0897
7.4L w/Hurth (IB) ALL --18-0897
7.4L w/Hurth (IB) ALL --18-0897
7.4L (IB/LHR/Gen V) D715494 & up --18-0897
7.4L (IB/LHR/Gen V) D715494 & up --18-0897
8.2L w/Hurth (IB) C878221 & up --18-0897
8.2L w/Hurth (IB) C878221 & up --18-0897
8.2L (IB) (Gen V)* D857200 & up --18-0897
8.2L (IB) (Gen V)* D857200 & up --18-0897

Model

Serial Number

Exhaust Manifold Elbow

Exhaust Manifold Elbow

Elbow Gasket

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BARR MC-20-90880 replacement parts
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Exhaust Manifold Elbow - Sierra
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Part # 18-1937
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Mercury Marine 98504A3 replacement parts
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Part # 18-1970-1
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GLM 51120 replacement parts
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Part # 18-1971
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Mercury Marine 76325A2 replacement parts
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Part # 18-1972
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BARR MC-20-55538 replacement parts
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Part # 18-1973
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Mercruiser Exhaust Manifold Risers
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Part # 18-1975-1
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BARR MC-20-98502 replacement parts
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Part # 18-1974-1
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BARR MC-20-44354 replacement parts
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Part # 18-1976-1, List Price: $250.99
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Mercury Marine 76771A2 replacement parts
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Part # 18-1978
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Pleasurecraft Exhaust Manifold Elbows
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Part # 18-1991
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BARR 200087P replacement parts
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Part # 18-1992-1
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Riser, Elbow - Mallory
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Part # 9-40553
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Riser, Elbow 3" - Mallory
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Part # 9-40558
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Riser, Elbow - Mallory
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Riser, Elbow - Mallory
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Riser, Elbow - Mallory
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Mercury Marine Elbow - H20 Manifolds
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Part # T-20974
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Sierra
Customer Reviews Customer Questions & Answers Shipping
Average Customer Review for Exhaust Manifold Elbow - 18-1937 - Sierra
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Nice product
by Chris from Ramona, California on August 27, 2011
I give the product itself 5 stars BUT This is actually an osco manifold with sierra sticker on the box. Nice USA made product but sierra charges more then osco direct retail price.
(3 of 3 people found this review helpful)
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Average Customer Review for Sierra 18-1971 Exhaust Manifold Elbow
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228 Mercruiser exhaust riser
by Joseph from Naples, Florida on August 11, 2016
Awesome customer service!
(2 of 3 people found this review helpful)
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Good part
by Glen from Shaunavon, Saskatchewan on February 01, 2015
Elbow fit well, and looks well built.
(2 of 3 people found this review helpful)
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Full StarFull StarFull StarFull StarFull Star
EXCELLENT AFTERMARKET PART
by James from Hamptonville, North Carolina on September 27, 2011
This elbow is far superior to the "stock" units that are no longer available. It is solid cast for as twin-wall and the bolt mating end is stainless steel!
(4 of 5 people found this review helpful)
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Average Customer Review for Exhaust Manifold Elbow Riser - 18-1975-1 - Sierra
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Good all around
by Travis from Ithaca, New York on June 05, 2016
Just what I ordered....
(2 of 3 people found this review helpful)
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Exhaust Manifold Elbow Riser - Sierra
by William from Poquoson, Virginia on May 11, 2012
Perfect fit and with everything I needed included, it installed in minutes.
(4 of 5 people found this review helpful)
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Average Customer Review for Exhaust Manifold Elbow - 18-1974-1 - Sierra
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Exhaust manifold elbow
by Richard from Brentwood, New Hampshire on June 10, 2016
Great product for the price and exact fit.
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Average Customer Review for Exhaust Manifold Elbow - 18-1976-1 - Sierra
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riser
by Eric from Pointe Claire, Quebec on July 09, 2014
perfect
(2 of 3 people found this review helpful)
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Q:
Does this come with the gaskets?
A:
No that gasket is sold separately.

Answer Question

Q:
Re mercury marinereplacement parts for 76771A3 what is the difference between the two? Why does the Mallory have a flange like piece sticking out the exhaust and the other does not?
A:
Mallory design is more universal to late model inboard engines, so it accommodates more motors.

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