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  Home > Sterndrive Parts (Inboard Outboard) > Mercruiser Sterndrives > Exhaust System for Mercruiser > Manifolds for Mercruiser


Manifolds for Mercruiser
Code / Price Name / Description
GLM51230   

$169.95 
This item is out of stock, please order HGE7114
Quantity in Basket: none
Manifold Exhaust for Mercruiser GM 305 5.0L 350 5.7L V8 1983-2003 87114


Exhaust Manifold Assembly Iron Casting
Fits Mercruiser Model GM 305 350 377 305 350 6.2 V8 Small Block 1983 2003
Replaces the following:
Manufacturer Part #s
Mercury Marine Quicksilver 860246A15, 860246A10
Osco 7114B, 7114B2
Aqua-Power 5500, 5500-1
Barr MC-1-87114
Mallory 9-40507
Sierra 18-1953, 18-1953-1, 18-1953-2
GLM 51230
HGE 7114

dimensions
(shown with a 4" riser)


NOTE: This manifold WILL NOT FIT Dry Joint Exhaust Systems.
Click here if you have a Dry Joint Exhaust
GLM Cast Iron Manifolds and Risers come with a 3-year limited warranty (PDF)!
 
HGE7114   

$199.95 

   
Quantity in Basket: none
Manifold Exhaust Mercruiser GM 305 5.0L 350 5.7L V8 Center Rise


Marine Exhaust Manifold for Mercruiser GM Small Block V8 305 - 350 cu.in. Models 220, 228, 230, 260 and 898. Fits models from 1983-2002.
In about 2003 Mercruiser went to a Dry Joint exhaust system there no water came out around the exhaust outlet on the manifold to riser port. This is the earlier design which has 4 water ports around the exhaust riser flange area.
Replaces: AP5500; OSC7114B; MC-1-87114; MP0994-100; Sierra 18-1953-1; GLM 51230
Click Here for a front and rear view of this manifold

NOTE: This manifold WILL NOT FIT Dry Joint Exhaust Systems.
Click here if you have a Dry Joint Exhaust
HGE Cast Iron Manifolds and Risers come with a 3-year limited warranty!

 
HGE9746   

$209.00 

   
Quantity in Basket: none
Manifold Exhaust for Mercruiser GM 4.3L 262 V6 1983-2002 99476


Exhaust Manifold Assembly (Iron Casting)
Fits Mercruiser GM V6 Model 229 cu.in. and 262 cu.in. Model 185R, 185MR, 205R and 205MR (1983 - up)
Replaces Mercruiser: 99746A17, 99745, 99746
Barr: MC-1-99746
GLM: 51220
Marine Power: 0996-000
Osco: 9745
Sierra: 18-1952-1
Aqua Power: 5505
Includes Manifold and Riser Gaskets along with necessary mounting hardware

Click Here for a front and rear view of this manifold

NOTE: This manifold WILL NOT FIT Dry Joint Exhaust Systems.
Click here if you have a Dry Joint Exhaust
HGE Cast Iron Manifolds and Risers come with a 3-year limited warranty!
 
GLM51240   

$169.00 

   
Quantity in Basket: none
Manifold Exhaust Marine for Mercruiser GM 454 7.4L 502 8.2L V8 89011


Exhaust Manifold for Mercruiser Big Block 7.4L 454 applications. This center riser Exhaust Manifold was used on GM Big Block Engines From 1983 & up. It uses Riser Osco # 8503A for the 3.0", and Osco # 4354 for the 4.0". Also, the mounting kit is Osco # 9011-MK.

NOTE:
Replaces: Mercury Quicksilver #s: 807078A6, 89011A8; Barr # MC-1-89011; GLM # 51240; Sierra # 18-1957-1; Mallory # 9-40506

Osco Manifolds and Risers come with a 3-year limited warranty (PDF)!
 
OSC9011A   

$169.95 
   
sale item

Was $199 Now $169.95

Quantity in Basket: none
Manifold Exhaust Marine for Mercruiser GM 454 7.4L 502 8.2L V8 89011


Exhaust Manifold for Mercruiser Big Block 7.4L 454 applications. This center riser Exhaust Manifold was used on GM Big Block Engines From 1983 & up. It uses Riser Osco # 8503A for the 3.0", and Osco # 4354 for the 4.0". Also, the mounting kit is Osco # 9011-MK.

NOTE:
Replaces: Mercury Quicksilver #s: 807078A6, 89011A8; Barr # MC-1-89011; GLM # 51240; Sierra # 18-1957-1; Mallory # 9-40506

Osco Manifolds and Risers come with a 3-year limited warranty (PDF)!
 
GLM51220   

$209.00 
   
Quantity in Basket: none
Manifold Exhaust for Mercruiser GM 262 4.3L V6 1983-2002 99746A17


Exhaust Manifold Assembly for most Mercruiser Model 175-205 GM 229/262 CID V6 1983 - 2002 that have a two piece exhaust system.
OEM: 99746A17
Cross Reference Part Numbers
Mercruiser 99746A17
Osco 9745
Barr MC-1-99746
GLM 51220
Sierra 18-1952-1
Mallory 9-40505

dimensions
(shown with a 4" riser)

NOTE: This manifold WILL NOT FIT Dry Joint Exhaust Systems.
Click here if you have a Dry Joint Exhaust
GLM Cast Iron Manifolds and Risers come with a 3-year limited warranty (PDF)!
 
OSCCVCR818   

$198.00 

Sorry, OSCCVCR818 is temporarily backordered. Please check back later.


Quantity in Basket: none
Manifold, Exhaust, for Mercruiser GM 305 5.0L, 350 5.7L V8


Generic replacement Manifold for Mercruiser GM small block with 6-bolt risers
Osco Manifolds and Risers come with a 3-year limited warranty (PDF)!
 
HGE9011   

$199.00 

   
Quantity in Basket: none
Manifold Exhaust Marine for Mercruiser GM 454 7.4L 502 8.2L V8 89011


Exhaust Manifold for Mercruiser Big Block 7.4L 454 applications. This center riser Exhaust Manifold was used on GM Big Block Engines From 1983 & up. It uses Riser Osco # 8503A for the 3.0", and Osco # 4354 for the 4.0". Also, the mounting kit is Osco # 9011-MK.

NOTE:
Replaces: Mercury Quicksilver #s: 807078A6, 89011A8; Barr # MC-1-89011; GLM # 51240; Sierra # 18-1957-1; Mallory # 9-40506

Osco Manifolds and Risers come with a 3-year limited warranty (PDF)!
 
OSC7234B   

$209.95 

Sorry, OSC7234B is temporarily backordered. Please check back later.


Quantity in Basket: none
Exhaust Manifold for Mercruiser GM 305, 350 Small Block V8 Log (Port)


Log Style Manifold for a Mercruiser. It will fit a GM small block V8 on the Port side, and was used up to 1982. This manifold uses an Osco # O6351 90° down angle for most sterndrives, and an Osco # 6771 0° down angle for most inboard applications. This item replaces Mercury Quicksilver # 77234B; Barr # MC-1-77234; GLM # 51237; Sierra # 18-1950-1; Mallory # 9-40503
Osco Manifolds and Risers come with a 3-year limited warranty (PDF)!
 
HGE7114ALUM   

$229.00 

   
Quantity in Basket: none
Aluminum Exhaust Manifold, Mercruiser GM 305 5.0L, 350 5.7L V8 Center Rise


Aluminum manifold fits for Mercruiser GM Small Block V8 305 - 350 cu.in. Models 220, 228, 230, 260 and 898.
Replaces: AP5500; OSC7114B; MC-1-87114; MP0994-100; Sierra 18-1953-1; GLM 51230
Click Here for an exhaust port view of this manifold

NOTE: This manifold WILL NOT FIT Dry Joint Exhaust Systems.
Click here if you have a Dry Joint Exhaust
HGE Manifolds and Risers come with a 3-year limited warranty!
Extra Shipping applies for Aluminum Manifolds: $9 for states east of the Mississippi, $12 for states west of the Mississippi
Shipping outside of the contiguous US will be sent by email after the order is placed
 
BARMC-1-87114   

$229.95 

   
New Item Quantity in Basket: none
Manifold Exhaust for Mercruiser GM 305 5.0L 350 5.7L V8 1983-newer 860246A15


Direct replacement water cooled exhaust manifold for Mercruiser with a small block GM V8 Center Riser.  It was used from 1983 to about 2003.  Uses riser Osco # 8503A for 3.0", and riser Osco # 4354 for 4.0"  The mounting kit is Osco # 7214-MK.

NOTE: This manifold WILL NOT FIT Dry Joint Exhaust Systems.
Click here if you have a Dry Joint Exhaust

Replaces the following:
Manufacturer Part #s
Mercury Marine Quicksilver 860246A15, 860246A10
Osco 7114B, 7114B2
Aqua-Power 5500, 5500-1
Barr MC-1-87114
Mallory 9-40507
Sierra 18-1953, 18-1953-1, 18-1953-2
GLM 51230
HGE 7114

Barr Manifolds and Risers come with a 3-year limited warranty (PDF)!

 
OSCCV818-350XRB   

$249.95 
   
Quantity in Basket: none
Manifold, Exhaust, for GM 305 5.0L, 350 5.7L V8 Log Style


Log Style Manifold Assembly. Fits GM V8 283 / 305 / 307 /327 / 350 / 400 cu.in. engines. Includes OSCBW Front Plate for 1/2" pipe fittings and OSCBE End Plate for 2-1/2" threaded, (2) OSCBG End Plate Gaskets, and manifold mounting hardware.
Osco Manifolds and Risers come with a 3-year warranty (PDF)!
 
BARMC-1-95862   

$260.95 
   
Quantity in Basket: none
Manifold Exhaust for Mercruiser GM 153 2.5L 181 3.0L with Rochester Carb 95862A5


Log Style Manifold replaces Merc # 95862A5.
Fits most late model 2.5L & 3.0L with Rochester Carburetor.
(6-Bolt pattern)
No choke stove
Determine which carburetor my application used  
BARMC-1-99798   

$260.95 
   
Quantity in Basket: none
Manifold Exhaust for Mercruiser 120 140 2.5-3.0L using MerCarb 1983-1989 1-99798


Exhaust Manifold for Mercruiser Models 120/140 GM 153/181 CID 2.5L/3.0L Inline 4 Cylinder used between 1983 and 1989 with Mercarb Carburetor which has a bolt pattern measuring 1-15/16" X 3-5/8" inches.
Note: This Manifold will replace 5 or 6 Bolt Models
Determine which carburetor my application used
Uses Gasket with the following characteristics

Mercarb gasket
 
HGE4612   

$269.00 

Sorry, HGE4612 is temporarily backordered. Please check back later.


New Item Quantity in Basket: none
Manifold Exhaust for Mercruiser 4.3L V6 262 Dry Joint 2003 up 864612T01


Port or Starboard manifold for Mercruiser 4.3L V6 with Dry Joint Exhaust
It fits MCM GM 4.3L V6 262 CID 2003 and newer (Serial Numbers: 0M615000 and up)
Replaces Mercury Quicksilver # 864612T01
Includes 1 manifold gasket, 1 riser gasket, 1 open seal ring, 1 restrictor seal ring, 2 closed seal rings, mounting hardware and plugs as pictured
How to determine if you have Dry-Joint Exhaust
Cross Reference Part Numbers
Mercury Quicksilver 864612T01, 99746A17
Osco (not yet available)
Barr (not yet available)
Mallory 9-40509
HGE 4612
 
BARMC-1-96705   

$269.95 
   
Quantity in Basket: none
Manifold Exhaust for Mercruiser GM 153 2.5L 181 3.0L with Rochester Carb 96705A1


Log Style Manifold replaces Merc # 96705A1.
Fits most late model 2.5L & 3.0L with Rochester Carburetor.
(6-Bolt pattern)
Choke Stove Provision
Has choke stove provision

Uses this carburetor gasket and bolt pattern:
Rochester 2 BBL Carburetor Bolt Pattern
Determine which carburetor my application used  
HGE5735   

$269.99 

   
New Item Quantity in Basket: none
Manifold Exhaust for Mercruiser Dry Joint V8 5.0L 5.7L 6.2L 2004 up 865735A02


Exhaust Manifold, fits port or starboard for Dry Joint Exhaust systems used on Mercruiser 5.0L, 5.7L, 377, 6.2 engines 2004 and newer. Notice no water ports surrounding the exhaust port.
Replaces Mercury Marine Quicksilver original equipment part # 865735A02; Osco # 5735; Barr # MC-1-865735; Mallory # 9-40508
How to determine if you have Dry-Joint Exhaust
Manifold comes with:
  • Manifold Gasket
  • Stainless Steel Plate Gasket
  • Open Seal Ring
  • Restrictor Seal Ring
  • Closed Seal Ring (2)
  • Bolt 3/8"-16UNC x 5" (4)
  • Lock Washer (4)
  • Steel Plug 3/4" NPT
  • Brass Plug 1/8" NPT (2)
 
BARMC-1-99746   

$279.95 
   
New Item Quantity in Basket: none
Manifold for Mercruiser GM 4.3L 262 cid V6 99746A17


Exhaust Manifold for a Mercruiser. It is for a GM V6 with a Center Riser application. It was used from 1983 & up. It uses 3.0" Riser Osco # 8503A or Barr # MC-20-98504, and 4.0" Riser Osco # 4354. It comes with the manifold gasket and mounting hardware.
Rear side of manifold
Cross Reference Part Numbers
Mercruiser 99746A17
Osco 9745
Barr MC-1-99746
GLM 51220
Sierra 18-1952-1
Mallory 9-40505

Click here to see a high resolution photo of this manifold.

NOTE: This manifold WILL NOT FIT Dry Joint Exhaust Systems.
Click here if you have a Dry Joint Exhaust

Barr Manifolds and Risers come with a 3-year limited warranty (PDF)!
 
HGE9011ALUM   

$289.00 

   
Quantity in Basket: none
Aluminum Exhaust Manifold, GM 454 7.4L, 502 8.2L V8 Mercruiser


Aluminum Exhaust Manifold for Mercruiser GM V8 Big Block Engine Models 330, 340 and 454 Magnum Inboard and stern-drive unit
Replaces: AP5506; OSC9011; MC-1-89011; MP0991-100
Click Here to view the exhaust port side of this manifold

HGE Manifolds and Risers come with a 3-year limited warranty!
Extra Shipping applies for Aluminum Manifolds: $9 for states east of the Mississippi, $12 for states west of the Mississippi
Shipping outside of the contiguous US will be sent by email after the order is placed
 
BARMC-1-52390   

$299.00 

   
Quantity in Basket: none
Manifold Exhaust for Mercruiser GM 181 3.0L 4 Cylinder 140 HP1968-1982 52390A1


Direct replacement Manifold for a 3.0L Mercruiser. It is a log style manifold used from 1968 to 1982. OEM # 52390A1
Determine which carburetor my application used  
BARMC-1-865735   

$299.00 
   
Quantity in Basket: none
Manifold Exhaust for Mercruiser Dry Joint V8 5.0L 5.7L 6.2L 2004 Up 865735A02


Exhaust Manifold, fits port or starboard for Dry Joint Exhaust syetems used on Mercruiser 5.0L, 5.7L, 377, 6.2 engines 2004 and newer. Notice no water ports surrounding the exhaust port.
Replaces OEM: 865735A02
How to determine if you have Dry-Joint Exhaust
 
BARMC-1-77234   

$299.00 
   
New Item Quantity in Basket: none
Exhaust Manifold for Mercruiser GM 305 350 Small Block V8 Port B-77234A2 77234B


Log Style Manifold for a Mercruiser. It will fit a GM small block V8 on the Port side, and was used up to 1982. This manifold uses an Osco # O6351 90° down angle for most sterndrives, and an Osco # 6771 0° down angle for most inboard applications. This item replaces Mercury Marine Quicksilver original equipment part #s: B-77234A2, 77234B; Osco # 7234B; GLM # 51237; Sierra # 18-1950-1; Mallory # 9-40503
Barr Manifolds and Risers come with a 3-year limited warranty (PDF)!
 
BARMC-1-77235   

$299.00 
   
New Item Quantity in Basket: none
Exhaust Manifold for Mercruiser GM 305, 350 Small Block V8 Starboard Log


Log Style Manifold for a Mercruiser. It will fit a GM small block V8 on the Starboard side, and was used up to 1982. This manifold uses an Osco # O6351 90° down angle for most sterndrives, and an Osco # 6771 0° down angle for most inboard applications. This item replaces Mercury Quicksilver # B-77235A2, 77235B; Barr # MC-1-77235; GLM # 51238; Sierra # 18-1951-1; Mallory # 9-40504
Barr Manifolds and Risers come with a 3-year limited warranty (PDF)!
 
BARMC-1-63122   

$325.95 
   
Quantity in Basket: none
Manifold Exhaust for Mercruiser GM 153 CID 2.5L 120 HP 4 Cylinder 1982-Prior


Manifold for Mercruiser GM Inline 4 Cylinder 153 C.I.D. 2.5L 120 HP 1982 and earlier
Log Style Direct Replacement
Model 120 Engine
Note: Manifold includes all plugs, gaskets and mounting hardware to head.
 
BARMC-1-89011   

$325.95 

Sorry, BARMC-1-89011 is temporarily backordered. Please check back later.


Quantity in Basket: none
Manifold Exhaust Marine for Mercruiser GM 454 7.4L 502 8.2L V8 89011


Exhaust Manifold for Mercruiser Big Block 7.4L 454 applications. This center riser Exhaust Manifold was used on GM Big Block Engines From 1983 & up. It uses Riser Osco # 8503A for the 3.0", and Osco # 4354 for the 4.0". Also, the mounting kit is Osco # 9011-MK.

NOTE:
Replaces: Mercury Quicksilver #s: 807078A6, 89011A8; Barr # MC-1-89011; GLM # 51240; Sierra # 18-1957-1; Mallory # 9-40506

Osco Manifolds and Risers come with a 3-year limited warranty (PDF)!
 
BARMC1-47735   

$328.10 
   
Quantity in Basket: none
Manifold Exhaust for Mercruiser GM 454 7.4L V8 Port with Log Riser B-47735A1


Exhaust Manifold for GM 454 cid log style Mercruiser (port side)
Models 325, 330, 350, 370 and 400 Inboard Units with Log Style manifolds
Replaces Mercury Marine Quicksilver original equipment part # B-47735A1; GLM # 51264
 
BARMC1-47736   

$328.10 
   
Quantity in Basket: none
Manifold Exhaust Mercruiser GM 454 V8 Starboard with Log or Rear Riser


Exhaust Manifold for GM 454 cid log style Mercruiser for starboard side.
Models 325, 330, 350, 370 and 400 Inboard and I/O Units with Log Style manifolds
OEM: B-47736A1
 
BARMC1-47737   

$328.10 
   
Quantity in Basket: none
Manifold Exhaust Log Style for Mercruiser GM Small Block V8 Port 47737A10


Exhaust Manifold for GM Small Block V8 Mercruiser Models 225, 250, 255, 270, 280 (port side)
Replaces Mercury Marine Quicksilver original equipment part #s: 47737A10, B-47737A; GLM51233

NOTE:
This manifold has a riser pattern that looks like this:

correct riser pattern
If your manifold has a riser pattern that looks like this:
 
BARMC1-47738   

$328.10 
   
Quantity in Basket: none
Manifold Exhaust Log Style for Mercruiser GM Small Block V8 Starboard 47738A10


Exhaust Manifold for GM Small Block V8 Mercruiser Models 225, 250, 255, 270, 280 (starboard side)
Replaces Mercury Marine Quicksilver original equipment part #s: 47738A10, 8-47738A1; GLM # 51234

NOTE:
This manifold has a riser pattern that looks like this:

correct riser pattern
If your manifold has a riser pattern that looks like this:
 
MER864612T01   

$389.95 
   
Quantity in Basket: none
Manifold Exhaust Mercruiser V6L 4.3L 2003 Up Dry Joint 864612T01


Port or Starboard manifold for Mercruiser V6 with Dry Joint Exhaust
It fits MCM GM 4.3L V6 262 CID 2002 and newer (Serial Numbers: 0M615000 and up)
Replaces OEM: 864612T01
How to determine if you have Dry-Joint Exhaust
 
BARMC-1-860235   

$423.30 
   
Quantity in Basket: none
Manifold Exhaust for Mercruiser GM 181 3.0L 3.0LX 1990 and newer 806867A12


Exhaust Manifold Assembly for Mercruiser Model 3.0LX/3.0L GM 181 CID Inline 4 cyl. (1990 and up) with Mercarb carburetor 1-5/16" X 3-5/8". 3.0L GM 181 Inline 4 1990-1994, 3.0L GM 181 Inline 4 1998, 3.0L GM 181 Inline 4 1990-1995, 3.0L GM 181 Inline 4 1996-1997, 3.0L GM 181 Inline 4 1999-Current. This item replaces Mercury Marine Quicksilver original equipment part # 806867A12.
This manifold includes all plugs, gaskets and mounting hardware to mount to head.
Uses Gasket with the following characteristics

Mercarb gasket
 
MER860235A03   

$459.00 
   
Quantity in Basket: none
Manifold Exhaust for Mercruiser 3.0L 1990-up using MerCarb 860235A03


Manifold for Mercruiser GM 3.0L 1990 and newer Inline 4 Cylinder with MerCarb Carburetor
Includes Gaskets, mounting hardware and Carburetor fuel line.
This genuine Mercury Marine Quicksilver part supersedes # 806867A12; Replaces: A/P # 5527 and GLM # 51214
Uses Gasket with the following characteristics

Mercarb gasket
 
BARMC-1-58759   

$510.00 
   
Quantity in Basket: none
Manifold Exhaust for Mercruiser 165 200 Inline 6 Cylinder GM 250 58759


Manifold fits Mercruiser GM 165 and 200 hp inline 6 cylinder. The 165 HP is a 250 Cubic inch engine with a 2 BBl Carburetor. The 200 is pretty rare and was a 292 Cubic inch engine with a 4BBL Carburetor. All original brackets plates and fittings fit this manifold.  
BPI6219A   

$799.95 
   
Quantity in Basket: none
Manifold, Exhaust, for Mercruiser 3.7L 224 cid, Aluminum 816219A 5


Aftermarket Aluminum Manifold for a Mercruiser 3.7L (224 c.i.d.). It uses riser OSC8561 and GLM13040.
Replaces: Mercury 816219A 5; GLM 51202; HGE 6219A
Includes a mounting kit with the following:

  • 1 Manifold Gasket
  • 1 Riser Gasket
  • 1 Thermostat Housing
  • 1 Thermostat Housing Gasket
  • 2 Bolt 3/8" 16UNC x 1" with lockwashers and flat washers
  • 3 Bolt 3/8" 16UNC x 6" with lockwashers
  • 4 Stud 7" long, (One end 3/8" - 16UNC; One end 3/8" - 16UNF) with lockwashers, flat washers and nuts

Riser Port
Riser Port

Thermostat Housing Port
Thermostat Housing Port (for Thermostat Housing that is included)
Note: Thermostat and water temperature sender are not included

Note: If you are replacing a cast iron manifold of the same style with this aluminum one, you must also replace the riser.


Extra Shipping applies for Aluminum Manifolds: $9 for states east of the Mississippi, $12 for states west of the Mississippi
Shipping outside of the contiguous US will be sent by email after the order is placed
 
MER816219A5   

$929.00 
   
Quantity in Basket: none
Manifold Exhaust Marine for Aluminum Mercruiser 3.7L 224 816219A5


Original Equipment Aluminum Manifold for a Mercruiser 3.7L 224 c.i.d.. If you do not know whether your current manifold is cast iron or aluminum, look at the riser bolts. If the riser bolts are about 4 inches long you have an aluminum manifold. If your riser bolts are about 1.5 Inches long then you have a cast Iron Manifold. They are not interchangeable. The riser bolt pattern is different.

It uses riser OSC8561. If you are replacing a cast iron manifold of the same style with this aluminum one, you must also replace the riser.

Extra Shipping applies for Aluminum Manifolds: $9 for states east of the Mississippi, $12 for states west of the Mississippi
Shipping outside of the contiguous US will be sent by email after the order is placed
 
BARMC-1-65603   

$299.00 
   
Quantity in Basket: none
Manifold (Starboard) for Ford Mercruiser Log Style


Log Style Manifold for a Mercruiser. It will fit a Ford small block V8 302/351 on the Starboard side, and was used from 1970 to 1977. This manifold uses an Osco # O6351 90° down angle riser for most sterndrives, and an Osco # 6771 0° down angle riser for most inboard applications. This item replaces Mercury Quicksilver # 65603; Osco # 5603; Sierra # 18-1962; Mallory # 9-40501
Barr Manifolds and Risers come with a 3-year limited warranty (PDF)!
 
BARMC-1-65604   

$299.00 
   
Quantity in Basket: none
Exhaust Manifold (Port) for Ford Mercruiser Log Style


Log Style Manifold for a Mercruiser. It will fit a Ford small block V8 302/351 on the Port side, and was used from 1970 to 1977. This manifold uses an Osco # O6351 90° down angle riser for most sterndrives, and an Osco # 6771 0° down angle riser for most inboard applications. This item replaces Mercury Quicksilver # 65604; Osco # 5604; Sierra # 18-1958; Mallory # 9-40502
Barr Manifolds and Risers come with a 3-year limited warranty (PDF)!