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Exhaust Spacers, Blocks for Mercruiser
Code / Price Name / Description
BAR20-0097   

$99.95 
   
Quantity in Basket: none
Spacer Riser Block Extension Exhaust 3 Inch High Barr Style 20-0097


3 inch high spacer that is used on "Barr Style" center riser manifolds. It goes between the riser and the manifold, and is capable of being stacked if more than 3 inches is needed.

Fits the following manifolds: Osco # 994; Barr # CHVA-1-83; GLM # 56230; Sierra # 18-1997-1; Osco # CW994; Barr # CHVA-1-84; GLM # 56240; Sierra # 18-1898; Osco # FL994; Barr # FM-1-83; GLM # 56250; Sierra # 18-1998-1.

Fits the following Risers: Osco # 992; Barr # 20-0082; GLM # 56110; Sierra # 18-1999; Osco # 99204; Barr # 20-0100; GLM # 56140; Sierra # 18-1939; Osco # 2018 ; Barr # 20-0102; GLM # 56120; Sierra 18-1907

Fits Mercruiser: V8 Models 188, 215, 225, 233, 255, 302, 351 and 888 All Years Center Riser Generic
V8 Models 325, 330, 340 and 350 Inboard and Stern-Drive Units Center Riser Generic
V8 Models 190, 198, 225, 250, 270, 228, 898, 260, 255 and 280 Inboard and Stern-Drive Units Center Riser Generic
Fits Crusader: V8 - 427 and 454 CID All Models Inboard Center Riser Generic
Fits Chris Craft: V8 - 454 CID Center Riser Generic
Fits Indmar: V8 - 427 and 454 CID All Models Inboard Center Riser Direct Replacement

Replaces: Osco # 994S3; Sierra # 18-1949; GLM # 56030; Mallory # 9-40130

 
BAR20-0099   

$76.95 
   
Quantity in Basket: none
Spacer Riser Block Exhaust Extension 2 Inch Barr Indmar Marine Power


2" High Spacer for the following Barr Style Manifolds and Risers:
GLM56110
GLM56140
GLM56230
GLM56240
GLM56250
OSC2018
OSC992
OSC99204
OSC994
OSCCW994
OSCFL994
 
BARMC-20-61811A4   

$170.95 
   
Quantity in Basket: none
Riser Spacer Extension Block 3 Inch Mercruiser V8 Long Log Style 61811A4


Manifold to riser 3� spacers (sold in pairs). Includes all mounting hardware, gaskets and drain plugs
For use with BARMC1-47735, BARMC1-47736, BARMC1-47737 and BARMC1-47738 Manifolds.
 
BARMC-20-61851A2   

$170.95 
   
Quantity in Basket: none
Spacer Kit Riser 3 Inch for Mercruiser Log Style GM & Ford Small Block V8


Manifold to riser 3" spacers (sold in pairs). Includes all mounting hardware, gaskets and drain plugs
For use with OSC7234B, OSC7235B, OSC5603 and OSC5604 Manifolds.
Fits Mercruiser GM V8 Inboard and Sterndrive 198, 228, 255, 260 and 898 models; Mercruiser Ford V8 302 and 351 CID Inboard and Sterndrive 188, 215, 225, 888 models
 
BARMC-20-93322A3   

$189.95 
   
Quantity in Basket: none
Riser Extension Block Exhaust Spacer Kit 6 Inch Mercruiser Center Rise


6 Inch Spacer Kit used with Mercruiser Center riser Manifolds 1983-2002 V6 V8 Applications. Used to raise the height of the exhaust riser to maintain a downward exhaust slope. (GLM51240 and GLM51230) from 1983-present on V-6 & V-8 applications. The kit comes complete with all hardware and gaskets.
 
BARMC20-864908A1   

$437.95 
   
Quantity in Basket: none
Riser Extension Spacer Block Kit for Mercruiser 6 Inch Dry Joint 864908A1


Dry Joint 6" Riser Kit
Application for dry joint exhaust manifolds.
Replaces Mercruiser: 864908A1
How to determine if you have Dry-Joint Exhaust
NOTE: This spacer kit WILL FIT Dry Joint Exhaust Systems.
Click here if you have a Dry Joint Exhaust
 
BARMC20-864929A3   

$409.00 
   
Quantity in Basket: none
Riser Spacer Exhaust Kit 3 Inch Dry Joint Exhaust V6 V8 Mercruiser 864929A3


Dry Joint 3" Riser Kit
Application for dry joint exhaust manifolds.
Replaces Mercruiser: 864929A3
How to determine if you have Dry-Joint Exhaust
NOTE: This spacer kit WILL FIT Dry Joint Exhaust Systems.
Click here if you have a Dry Joint Exhaust
 
BPI50310   

$149.00 
   
Quantity in Basket: none
Riser Extension Spacer Block Kit for Mercruiser 3 Inch High 93320a13


Riser Extension Kit for Mercruiser 3 Inches high for use with 4 Inch exhaust riser. This is used to raise the level of the exhaust riser to keep a downward exhaust slope.
Cast Iron with gaskets and mounting hardware (as pictured)
Spacer Height is 3"
OEM: 93320A5
 
GLM50305   

$100.99 
   
Quantity in Basket: none
Spacer, Aluminum, 3 inch, Mercruiser V6, V8


Aluminum 3" Riser Block (Spacer)
Fits Mercruisers with Aluminum Center Rise Manifolds(HGE7114ALUM and HGE9011ALUM
Ordinarily 1983 and up (some exceptions apply)

NOTE: This item WILL NOT FIT Dry Joint Exhaust Systems
Click here if you have a Dry Joint Exhaust
Extra Shipping applies for Aluminum Spacers: $6 for states east of the Mississippi, $9 for states west of the Mississippi
Shipping outside of the contiguous US will be sent by email after the order is placed
 

GLM50610   

$239.95 
   
Quantity in Basket: none
Riser Extension Block Exhaust Spacer Kit 6 Inch Mercruiser Center Rise


6 Inch Spacer Kit used with Mercruiser Center riser Manifolds 1983-2002 V6 V8 Applications. Used to raise the height of the exhaust riser to maintain a downward exhaust slope. (GLM51240 and GLM51230) from 1983-present on V-6 & V-8 applications. The kit comes complete with all hardware and gaskets.
 
MER864929A3   

$599.00 
   
Quantity in Basket: none
Riser Extension Kit, 3 Inch, Mercruiser Dry Joint Exhaust


Dry Joint 3" Riser Kit
Application for dry joint exhaust manifolds.
How to determine if you have Dry-Joint Exhaust
NOTE: This manifold kit WILL FIT Dry Joint Exhaust Systems.
Click here if you have a Dry Joint Exhaust
Fits 2002-2004 MCM V-6 & V-8 (305, 350 & 377 cid) non-EC engines (s/n 0M615000-0W309999)
 
MER865995A01   

$509.00 
   
Quantity in Basket: none
Riser Spacer Block Kit, 1.7" Dry Joint Mercruiser Exhaust


Mercruiser 1.7" (43 mm) Exhaust Riser Kit for standard cooling and dry joint exhaust manifolds. Fits 2004 and newer MCM V-6 & V-8 (305, 350 & 377 cid) non-EC engines (s/n 0W310000 and up) & MIE V-8 (350 & 377 cid) non-EC engines (s/n 0M390000 and up).
*Kit includes Risers (pair) gaskets and Hardware
 
MER8M0063742   

$99.95 

Sorry, MER8M0063742 is temporarily backordered. Please check back later.


Quantity in Basket: none
Riser Spacer Assembly, Mercruiser, 1-1⁄4 inch


Riser Spacer Assembly for Mercruiser Applications
It fits 350 (EFI) GM V8 1988-1989 and 454 Mag. Bravo V8 1988-1992
This spacer is 1-1/4" tall and goes between the Riser and the Manifold on the above applications
 
OSC1851   

$59.95 
   
Quantity in Basket: none
Exhaust Spacer, 3", for Mercruiser Log


3" Spacer used on Mercruisers with Log Style Manifolds. It goes between the Manifold & the Riser. It fits Osco # 7234B, Osco # 7235B, Osco # 5603 & Osco # 5604 manifolds, uses Osco # 6351-G gaskets
Replaces: Mercury Quicksilver # 61851; Barr # MC-20-61851A2; GLM # 50330; Sierra # 18-1906; Mallory # 9-40532
 
OSC1851MK   

$19.95 
   
Quantity in Basket: none
Spacer Mounting Kit for Mercruiser OSC1851


Spacer mounting kit fits Osco # 1851 Spacer  
OSC3320   

$59.95 

   
Quantity in Basket: none
Block Riser Extension Exhaust Spacer 3 Inch for Mercruiser Center Rise 83-03


3" spacer used on Mercruiser applications. It goes between the manifold and the riser elbow. This item is used on all V6 and V8 Mercruisers with center riser manifolds from 1983 and up. It will fit Osco # 9745, Osco # 7114B & Osco # 9011 manifolds. It uses Osco # 8503-GR / Osco # 8503-GB / Osco # 8503-GO gaskets
Replaces: Mercury Quicksilver # 93322; Barr # MC-20-93320A3; GLM # 50300; Sierra # 18-1908; Mallory # 9-40530
NOTE: This item WILL NOT FIT Dry Joint Exhaust Systems.
Click here if you have a Dry Joint Exhaust
 
OSC3320-MK   

$19.95 
   
Quantity in Basket: none
Riser Mounting Kit for Mercruiser


Mounting Kit For 3" Spacer with 3" Riser on Mercruiser
Replaces: Barr # MC-20-93320A3P; GLM # 53331; Sierra # 18-8554; Mallory # 9-40582
 
OSC3320-MK-X   

$22.95 
   
Quantity in Basket: none
Riser Mounting Kit for Mercruiser


Mounting Kit For 3" Spacer with 4" Riser on Mercruiser
Replaces: Barr # MC-20-93320A3P; GLM # 53430; Sierra # 18-8555; Mallory # 9-40583
 
OSC3322   

$59.95 
   
Quantity in Basket: none
Exhaust Spacer, 6" for Mercruiser Center Riser


6" spacer used on Mercruiser applications. It goes between the manifold and the riser elbow. This item is used on all V6 and V8 Mercruisers with center riser manifolds from 1983 and up. It will fit Osco # 9745, Osco # 7114B & Osco # 9011 manifolds. It uses Osco # 8503-GR / Osco # 8503-GB / Osco # 8503-GO gaskets. This item replaces Mercury Quicksilver# 93322; Barr # MC-20-93322A3; GLM # 50600; Sierra # 18-1985; Mallory # 9-40531

NOTE: This item WILL NOT FIT Dry Joint Exhaust Systems.
Click here if you have a Dry Joint Exhaust
 
OSC3322MK   

$7.95 
   
Quantity in Basket: none
Riser Mounting Kit, 6" for Mercruiser


Mounting Kit for 6" Spacer with 4" Riser on Mercruiser
Replaces: Barr # MC-20-93322A3P; GLM # 53361; Sierra # 18-8556; Mallory # 9-40584
 
OSCCV-58   

$42.95 

Sorry, OSCCV-58 is temporarily backordered. Please check back later.


Quantity in Basket: none
Exhaust Spacer Kit V8 Small Block per side


Spacer, manifold (3 pieces). 5/8" thick.
Fits small block GM V8 manifolds.
Moves manifold out from engine to allow clearance at valve covers.