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Mercruiser manifolds and risers kits *Ford *GM *Chevy

GLM Marine aftermarket exhaust manifold for GM and Ford
120 - 140 hp. 4 cylinder V6 - V8 engines
  • GLM Marine aftermarket manifolds are made by " Lost Foam " technology for precise specification and casting quality. They have hot dipped galvanized coating black painted for corrosion resistance.
  • GLM fully tuned design to reduce back pressure and enhance flow to add increase engine horse power.
  • Fully tuned design allows manifold to add 30 - 40% water cooling area for longer life.
  • In the 4" elbow, there are two extra exits at each side to increase water flushing to avoid engine over heating.
  • In V8 GM small block, fully tuned design will guide exhaust gases directly to elbow without turbulence and back pressure. In the meantime, additional 40% water cooling area will decrease the entire manifold body temperature significantly.
  • In V8 GM big block, extra 30% water cooling area will help reduce temperature in port exit area for longer gasket life. The tuned design will reduce turbulence and enhance flow for higher and maximum marine engine power.
  • See our application / compatibility chart to find the right manifold parts for your engine.
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51210 120-140 hp gm 153 181 4 cyl.1982-1995
51210 120-140 hp gm 153 181 4 cyl.1982-1995
51210 Mercruiser
51210 Mercruiser
P/N 51210 Exhaust manifold 806867A8 GM 120 / 140 hp. 4 Cylinder 153 / 181 CID years 1982 - 1995

Contains the following item if required:
P/N 51210 Exhaust manifold 806867A8
P/N 33570 Gasket 27-96429
P/N 30920 Gasket-End cap (5 units) 27- 807218
P/N 31520 Gasket-elbow or adaptor 27- 99777- 2
P/N 51020 End cap 805629A1
P/N 51030 End cap-Exhaust manifold 73813A1
P/N 13980 Straight Fitting Water Drain Contents 22-862557
P/N 13992 Drain Plug Kit (5 Units) 22-806608A1
P/N 80140 O-Ring (5 Units) 25-45253
P/N 22443 Screw-End Cap (8 Units) 21-824941
P/N 32180 Gasket-Carburetor Base 27-807982
P/N 22444 Screw Edit 10-807212
P/N 22445 Screw (2 Units) 10-66863-1
P/N 22484 Stud (2 Units) 16-56826
P/N 21892 Plug-Exhaust Elbow 22-41622
P/N 21248 Flange Serrated Nut (5 Units) 11-46335
P/N 22482 Stud-Carburetor (2 Units) 16-70236
P/N 21664 Washer- Carburetor(5 Units) 12-20084
P/N 19354 Lock Nut Carburetor (5 Units) 11-25594
P/N 51160 Exhaust Elbow Assembly 12076A2
P/N 89120 Bellow-4" 32-44348T
P/N 01100 Clamp-Bellow 4" 54-815504372
P/N Exhaust Elbow Assembly 76325A2
P/N 22446 Screw-(2 Units) 10-72094
P/N 22447 Screw-(2 Units) 10-34354
P/N 21893 Plug 22-32802-2
P/N 21887 Plug 22-36382
P/N 13984 Straight Fitting 3/4-14 X1 22-807155

1968-1982
1968-1982
P/N 51212 Exhaust manifold 96705A1 $308.00 Model 140 - inline 4 Years 1968 to 1982

Including parts you may need:
P/N 51212 Exhaust manifold 96705A1
P/N 33570 gaskets 27- 53354
P/N 33570 gaskets 27- 53354
P/N 30920 Gasket-End cap (5 units) 27- 807218
P/N 31520 Gasket-to elbow (2 units) 27- 99777-2
P/N 31490 Gasket end cap (5 units) 27-48043-1
P/N 31660 Gasket carburetor base 27-64692
P/N 51030 End cap-contents Ref. 3 73813A1
P/N 22448 Screw-End cap (2 units) 10-25299
P/N 51010 End cap 60252A2
P/N 22449 Screw-End cap(6 units) 10-35386
P/N 22482 Stud-Carburetor (2 units) 16-70236
P/N 21664 Washer-Carburetor (5 units) 12-20084
P/N 51120 Exhaust elbow assembly 3" 90 degree angle 76351A2
P/N 51190 Exhaust elbow assembly 3" with 0 degree angle 76771A2

3.0 XL-3.0 liter 1990 up
3.0 XL-3.0 liter 1990 up
51214 4-cylinder 1990 up
51214 4-cylinder 1990 up
P/N 51214 Exhaust manifold assembly 3.0 Liter-3.0 LX with inline 4 and GM 181 CID 4 cylinder 806867A12 $313.00

Including parts that may be required:
P/N 33580 Exhaust Manifold gaskets 27-815528
P/N 30920 Gasket-End Cap 27-807218 *5 units
P/N 31520 Gasket to Elbow 27-99777-2 *2 units
P/N 51020 End Cap 805629A1
P/N 51030 End Cap 73813A1
P/N 13980 Straight-Water Draining Contents 22-862557
P/N 13992 Drain Plug Kit 22-806608A1
P/N 80140 O-Ring 25-45253 *5 units
P/N 22443 Screw-End Cap 10-824941 *8 units
P/N 32180 Gasket-Carburetor Base 27-807982
P/N 21745 Screw 10-53728 *2 units
P/N 22475 Stud 16-806300 *3 units
P/N 13984 Straight Fitting 3/4-14 X 1 (Brass) 22-807155
P/N 21248 Flange Serrated Nut 11-46335 *5 units
P/N 51160 Exhaust Elbow Assembly 12076A2
P/N 22482 Stud-Carburetor 16-70236 *2 units
P/N 21664 Washer-Carburetor 12-20084 *5 units
P/N 19354 Locknut-Carburetor 11-25594 *5 units
P/N 22445 Screw 10-66863-1 *2 units
P/N 89120 Exhaust Bellow-Exhaust Elbow 4" 32-44348T
P/N 01100 Clamp-Bellow 4" 54-815504372
P/N 21887 Plug 22-36382

51220 manifold 51140 exhaust elbow 4 inch
51220 manifold 51140 exhaust elbow 4 inch
P/N 51220 Exhaust manifold breakdown drawing for the Chevy 4.3L V6 marine engine. Center rise manifold - cast iron 99746A17 GM V6 229/262 CID 1983 and up for 3 inch 15 degree and 4 inch 7 degree elbows $203.00

Exploded view parts including:
P/N 51225 Exhaust manifold assembly Aluminum black
P/N 21892 22-41622 Plug Steel
P/N 21896 22- 42861- 1 Plug Brass *2 units
P/N 32170 27- 99757 Gasket-Exhaust manifold 2 units
P/N 13990 22-806926A1 Hose fitting with drain plug kit
P/N 30240 27-863724 Gasket - raw water cooling *2 units
P/N 30220 27-860231 Gasket - fresh water cooling *2 units
P/N 32080 27-863726 Gasket manifold and spacers
P/N 13991 22-86221A01 90 degree hose fitting
P/N 13992 22-806608A1 Drain plug kit contents
P/N 80140 25-45253 O-Ring *5 units Edit
P/N 51110 98504A3 Exhaust elbow Iron casting 3"
P/N 51115 Exhaust elbow Aluminum casting 3" 15 degree
P/N 51140 807988A2 Exhaust elbow Iron casting 4"
P/N 51145 Exhaust elbow Aluminum black 4" 7 degree
P/N 51146 Exhaust elbow Aluminum platinum 4" 7 degree
P/N 22391 16-49545 Stud Steel *4 units
P/N 22462 Stud stainless steel *4 units
P/N 50300 8074776A3 Spacer 3" Iron casting
P/N 50305 Spacer 3" Aluminum casting
P/N 50600 807477A2 Spacer 6" Iron casting
P/N 50605 Spacer 6" Aluminum black
P/N 22481 16-97520 Stud 3/8 x 5 use with 3" elbow / 3" spacer
P/N 22474 16-11375 Stud 3/8 x 9-1/2 use with 4" elbow / 3" spacer
P/N 21494 Lock-washer Stainless steel for aluminum manifold
P/N 21248 11-46335 Nut flange serrated nut *5 units
P/N 21246 Nut stainless steel *2 units
P/N 21898 22-32802-2 Plug
V8 1977 and before
V8 1977 and before
Models 198-228-898-225-270 GM engine 305 - 327 - 350 (1977 and before) V8 GM small block marine engines

Exploded view parts in drawing
P/N 51233 manifold (port side) 47737A10 Discontinued
P/N 51234 manifold (starboard side) 47738A10 Discontinued
P/N 31100 Gasket (2 units) 27-33395
P/N 31490 End cap gasket (5 units) 27-48043-1
P/N 31480 Gasket (2 units) 27-48042
P/N 51010 End cap 60252A2
P/N 51196 exhaust elbow72963A9
P/N 51194 exhaust elbow 76668A3

51264 port 51266 starboard
51264 port 51266 starboard
Models 325 / 330 / 350 and 400 for GM engines 427 / 454 / 482 cubic inch V8 years 1968 to 1986.
P/N 51264 Port side manifold and P/N 51266 starboard side manifold.

P/N 51264 47735A17 Exhaust manifold port
P/N 51266 47736A17 Exhaust manifold starboard
P/N 33760 27-46820 Gasket *2 units - exhaust manifold
P/N 31490 27-48043-1 Gasket end cap *5 units
P/N 31480 27-48042 Gasket exhaust elbow *2 units
P/N 51010 60252A2 End cap
P/N 51030 73813A1 End cap
P/N 22449 10-35386 Screw *8 units
P/N 51196 72963A9 Exhaust elbow Not available yet
P/N 51194 76668A3 Exhaust elbow Not available yet
P/N 22391 16-49545 Stud *4 units
P/N 21248 11-49838 Flange serrated nut *5 units

51224
51224
Models: 165 / 200 years 1969 to 1981 with Inline 6 cylinder GM motors

P/N 51224 58759A14 Exhaust manifold inline 6 cylinder
P/N 31440 27-46401 Gasket-Exhaust manifold
P/N 30920 27-807218 Gasket-End cap (5 units)
P/N 31520 27-99777- 2 Gasket-Exhaust manifold to elbow (2 units)
P/N 31490 27-48043-1 Gasket-End cap
P/N 30510 27-58764 Gasket-carburetor
P/N 51030 73813A1 End cap-exhaust manifold contents
P/N 22448 10-25299 Screw-end cap $4.89
P/N 51010 60252A2 End cap-exhaust manifold
P/N 21746 10-37562 Screw
P/N 51190 76771A2 Exhaust elbow assembly 3" 0 degree angle
P/N 51120 76351A2 Exhaust elbow assembly 3" 90 degree angle
P/N 51130 76325A2 Exhaust elbow assembly 3" 0 degree angle
P/N 22391 16-49545 Stud (4 units)
P/N 21248 11-49838 Nut (5 units)

305-350 1983 - present
305-350 1983 - present

Models 200 / 320 years 1983 and up V8 small block GM 305 / 350 / 377 CID engines with serial numbers 0M and up) 3 inch or 4 inch elbow fitting
P/N 51230 Mercruiser manifold - cast iron 860246A10 $170.00

Exploded view drawing includes:
P/N 51230 860246A10 Exhaust manifold iron casting assembly includes item number
P/N 21892 22-41622 Plug 3/4-14 steel *2 units
P/N 21896 Plug 3/4-14 brass
P/N 31100 27-33395 Edit Text Gasket *2 units exhaust manifold
P/N 13990 22-806926A1 Hose fitting with drain plug kit Contents
P/N 30240 27-863724 Gasket *2 units Raw water cooling
P/N 30220 27-860231 Gasket *2 units Fresh water cooling
P/N 32080 27-863726 Gasket *2 units
P/N 13991 22-806926 90 Degree hose fitting
P/N 13992 22-806608A1 Drain plug kit *5 units Contents Ref.10
P/N 80140 25-45253 O Ring *5 units
P/N 51110 98504A3 Exhaust elbow *iron casting 3" 15 Degree
P/N 51140 807988A2 Exhaust elbow *iron casting 4" 7 Degree
P/N 22391 16-49545 Stud *4 units - steel
P/N 50300 807467A3 Spacer 3" iron casting
P/N 50600 807477A2 Spacer 6" iron casting
P/N 22474 16-11375 Stud *4 units 3/8 x 9 1/2 use with 4" elbow
P/N 22481 16-97520 Stud *4 units 3/8 x 5 use with 3" elbow
P/N 21493 13-35048 Lock-washer *10 units
P/N 21248 11-46335 Flange serrated nut *4 units
P/N 21898 22-32802-2 Plug *2 units
P/N 22381 10-43749 Screw steel zinc plated
P/N 22379 22-73379 Plug *5 units
P/N 21745 10-53728 Screw *2 unit
P/N 21899 Plug
P/N 22355 10-12244 Screw *4 units
1977-1982
1977-1982
P/N 51237 Port side manifold 77234A7

For 198 - 898 V8 small block 5.0 / 5.7 liter log style with riser mount on end

GM model 330-370
GM model 330-370

P/N 51240 Exhaust manifold assembly - cast iron 8807078A6 330 - 370, V8 big block and GM 454/502 (1981 and up)

 

215 - 888 Ford 302/351 CID 5.0-5.8 liter exhaust manifold 1977 and older

 

P/N 51260 Port side manifold 807294A3 (1996 - 2001)

P/N 51262 Stbd side  807293A2

488 485 470 4-cylinder
488 485 470 4-cylinder
165 / 170 / 3.7 Liter / 180 / 190 / 470 / MCM 485 / 488 inline 224 CID 4 cylinder engines years 1980 to 1989

Exploded view parts including:
P/N 31710 816219A5 Gasket
P/N 32460 Gasket Flange
P/N 32470 Gasket Flange
P/N 22397 10-74727 Stainless steel screw
P/N 22479 16-78438-5 Stud (3 units)
P/N 21495 13-35048 Lock-washer (4 units)
P/N 21248 Flange serrated nut *5 units 11-46335
90880A2 Exhaust elbow and reservoir assembly
P/N 51180 98562A6 Exhaust elbow and reservoir assembly
P/N 21748 10-78259 screw (4 units
P/N 30820 27-71614 Edit Text Gasket filler cap (5 units)
P/N 21897 22-13234A1 Fitting kit filler hole
P/N 80290 25-45257 O-ring filler base
P/N 13890 36-13130 Cap
P/N 13986 22-45084 Hose fitting
P/N 13940 22-76170 Elbow fitting
P/N 13930 22-99498 $10.89 Edit Text
P/N 32100 27-89656-1 Gasket (5 units)
P/N 13590 89659A3 Thermostat housing
P/N 13590 15995 temperature sender
P/N 21496 13-39107 Lock-washer (2 units)
P/N 23233 10-73657 Screw (2 units)
P/N 13830 15995 temperature sender
P/N 21894 22-32803 plug
P/N 13040 99155A1 Thermostat
P/N 89070 Mercruiser 3.7 exhaust bellow

 

P/N 59235 Aluminum exhaust manifold kits with risers and mounting hardware $899.00 - $999.00 - GM V6 and V8 small block 3 inch or 4 inch hose fittings

51140 Elbow
51140 Elbow

Elbow and riser

Including:
P/N 51130 76325A2 elbow 120 and 140 hp. Years 1982 to 1985
P/N 51120 elbow 76351A2 2.5, 3 liter and V8 years 1981 and before
P/N 51140 elbow 4 inch O.D. V6 and V8 with bolts and plug 807988A2
P/N 51110 exhaust elbow 3 inch O.D. V6 and V8 with plug

Gaskets
Gaskets
Manifold Gaskets / GM / Ford engines for all Mercruiser / GM 4 cylinder, 6 cylinder, V6 and V8 models

Including:
Exhaust Manifold Mounting Gasket
P/N 31570 GM 181 3.0L CID 27-53354
P/N 31101 CHV-47-0000 Barr Style
P/N 31710 Mercruiser 224 cubic inch 3.7 liter engine manifold gasket for models 165, 170, 180, 190 and 470-MCM 485/488 Years 1980 to 1989 27-68715
P/N 31440 27-46401 GM 250 cubic inch 4.1 Liter
P/N 32170 GM 262 4.3 Liter CID (2 units)
P/N 33580 27-815528 GM 181 3.0L X CID
P/N 31100 27-33395 GM 305 / 350 cubic inch 5.0 and 5.7 liter Chevy engines 2 units
P/N 33790 Mounting Gasket 27-73866 Ford 302/351 5.0/5.8L CID 2 units
P/N 33760 Mounting Gasket 27-46820 GM 454 / 502 7.4 and 8.2 liter CID 2 units
P/N 31550 Exhaust Manifold Mounting Gasket 27-52546 GM 153 CID 2.5 liter CID

89090 Lower Tube
89090 Lower Tube
Lower engine exhaust bellow - manifold 3 inch elbow to 3 inch Y-pipe

Including:
P/N 89090 replaces Mercruiser 32-90949T works with model 120/140 years 1982 - 1995
Chevy 305 / 350 / 377, big block 454 / 502 and V6 229 / 262 (1981 up to serial numbers that start with 0M. 3 inch diameter part installs between the riser and the Y pipe