IMCO Marine

Powerflow Plus System - Black manifolds and risers - 30 degree

IMCO's totally new Powerflow Plus cast aluminum, fully water-jacketed exhaust manifolds are available in black or polished. Black manifolds and risers are hard-coat anodized inside and out to withstand the tough marine environment. The new Powerflow Plus featuresIMCO's innovative patented design with 33" internal runners and a new ultra hi-flow exhaust riser. Brackets are available for this system.

Powerflow manifolds are manufactured using the finest materials and most advanced techniques available. The high quality aluminum manifold castings feature water jackets that surround each exhaust passage, including the port, to eliminate the possibility of burn out.

The outside manifold surfaces are then coated with the highest quality epoxy powder coating available, creating a part that not only is highly corrosion resistant, but good looking as well. Features an external fitting to accept stock MerCruiser thermostat plumbing.

Powerflow Plus System - Black manifolds and risers - 85 degree

IMCO's totally new Powerflow Plus cast aluminum, fully water-jacketed exhaust manifolds are available in black or polished. Blackmanifolds and risers are hard-coat anodized inside and out to withstand the tough marine environment. The new Powerflow Plus features IMCO's innovative patented design with 33" internal runners and a new ultra hi-flow exhaust riser. Brackets are available for this system.

Powerflow manifolds are manufactured using the finest materials and most advanced techniques available. The high quality aluminum manifold castings feature water jackets that surround each exhaust passage, including the port, to eliminate the possibility of burn out.

The outside manifold surfaces are then coated with the highest quality epoxy powder coating available, creating a part that not only is highly corrosion resistant, but good looking as well. Features an external fitting to accept stock MerCruiser thermostat plumbing.

Powerflow Plus System - Polished manifolds and risers - 30 degree

IMCO's totally new Powerflow Plus cast aluminum, fully water-jacketed exhaust manifolds are available in black or polished. Black manifolds and risers are hard-coat anodized inside and out to withstand the tough marine environment. The new Powerflow Plus features IMCO's innovative patented design with 33" internal runners and a new ultra hi-flow exhaust riser. Brackets are available for this system.

Powerflow manifolds are manufactured using the finest materials and most advanced techniques available. The high quality aluminum manifold castings feature water jackets that surround each exhaust passage, including the port, to eliminate the possibility of burn out.

 The outside manifold surfaces are then coated with the highest quality epoxy powder coating available, creating a part that not only is highly corrosion resistant, but good looking as well. Features an external fitting to accept stock MerCruiser thermostat plumbing.

Powerflow Plus System - Polished manifolds and risers - 85 degree

IMCO's totally new Powerflow Plus cast aluminum, fully water-jacketed exhaust manifolds are available in black or polished. Black manifolds and risers are hard-coat anodized inside and out to withstand the tough marine environment. The new Powerflow Plus features IMCO's innovative patented design with 33" internal runners and a new ultra hi-flow exhaust riser. Brackets are available for this system.

Powerflow manifolds are manufactured using the finest materials and most advanced techniques available. The high quality aluminum manifold castings feature water jackets that surround each exhaust passage, including the port, to eliminate the possibility of burn out.

 The outside manifold surfaces are then coated with the highest quality epoxy powder coating available, creating a part that not only is highly corrosion resistant, but good looking as well. Features an external fitting to accept stock MerCruiser thermostat plumbing.

Powerflow Polished Small Block Manifolds Only Kit 

Powerflow manifolds are manufactured using the finest materials and most advanced techniques available. The high quality aluminum manifold castings feature water jackets that surround each exhaust passage, including the port, to eliminate the possibility of burn out.

The outside manifold surfaces are polished. Features an external fitting to accept stock MerCruiser thermostat plumbing. Kit includes gaskets and bolts.

Powerflow Polished Small Block System with Stainless Silent Choice Risers

This popular system allows the use of a switchable exhaust diverter. These risers are stainless steel and custom designed to ease installation. They use a standard 4" diverter connection.

Powerflow manifolds are manufactured using the finest materials and most advanced techniques available. The high quality aluminum manifold castings feature water jackets that surround each exhaust passage, including the port, to eliminate the possibility of burn out.

The outside manifold surfaces are polished. Features an external fitting to accept stock MerCruiser thermostat plumbing.

Black Small Block Manifolds

Black Small Block Manifolds. (Sold in pairs)

These manifolds were designed for high horsepower 350 cid to 427 cid engines that are making 350 HP Plus. Manifolds have a 1 1⁄2" I.D. runner with a tall D port entry. The outlet is 3" with a stainless steel air straightened plate to direct exhaust into riser pipe for maximum scavenging.

Manifolds will work with angled spark plugged heads or straight spark plugged heads. Also you can use tall valve covers for various rocker arm assemblies and stud girdle. Manifolds are available in black powder coated, hard anodized or polished in standard or recirc manifolds.

The risers are highly polished stainless steel, and are designed for 4" exhaust tips. We offer a wide variety of riser pipe configurations (AS SHOWN IN RISER PIPE SECTION), to accommodate just about every application. Custom riser pipes can also be manufactured to order, just give us a call for details.

Polished Small Block Manifolds.

Polished small block manifolds. (Sold in pairs)

These manifolds were designed for high horsepower 350 cid to 427 cid engines that are making 350 HP Plus. Manifolds have a 1 1⁄2" I.D. Runner with a tall D port entry. The outlet is 3" with a stainless steel air straightened plate to direct exhaust into riser pipe for maximum scavenging.

Manifolds will work with angled spark plugged heads or straight spark plugged heads. Also you can use tall valve covers for various rocker arm assemblies and stud girdle. Manifolds are available in black powder coated, hard anodized or polished in standard or recirc manifolds.,/p> The risers are highly polished stainless steel, and are designed for 4" exhaust tips. We offer a wide variety of riser pipe configurations (AS SHOWN IN RISER PIPE SECTION), to accommodate just about every application. Custom riser pipes can also be manufactured to order, just give us a call for details.

Black Small Block Recirculation Manifolds.

Black small block recirculation manifolds. (Sold in pairs)

These manifolds were designed for the water to recirculate or preheat (no water passes through riser pipe flange) high horsepower 350 cid to 427 cid engines that are making 350 HP Plus. Manifolds have a 1 1⁄2" I.D. Runner with a tall D port entry. The outlet is 3" with a stainless steel air straightened plate to direct exhaust into riser pipe for maximum scavenging.

Manifolds will work with angled spark plugged heads or straight spark plugged heads. Also you can use tall valve covers for various rocker arm assemblies and stud girdle. Manifolds are available in black powder coated, hard anodized.

The risers are highly polished stainless steel, and are designed for 4" exhaust tips. We offer a wide variety of riser pipe configurations (AS SHOWN IN RISER PIPE SECTION), to accommodate just about every application. Custom riser pipes can also be manufactured to order, just give us a call for details.

Polished Small Block Recirculation Manifolds.

Polished small block recirculation manifolds. (Sold in pairs)

These manifolds were designed for the water to recirculate or preheat (no water passes through riser pipe flange) high horsepower 350 cid to 427 cid engines that are making 350 HP Plus. Manifolds have a 1 1⁄2" I.D. Runner with a tall D port entry. The outlet is 3" with a stainless steel air straightened plate to direct exhaust into riser pipe for maximum scavenging.

Manifolds will work with angled spark plugged heads or straight spark plugged heads. Also you can use tall valve covers for various rocker arm assemblies and stud girdle. Manifolds are available in black powder coated, hard anodized.

The risers are highly polished stainless steel, and are designed for 4" exhaust tips. We offer a wide variety of riser pipe configurations (AS SHOWN IN RISER PIPE SECTION), to accommodate just about every application. Custom riser pipes can also be manufactured to order, just give us a call for details.

PowerFlow Small Block Bolt Kit

Powerflow Small Block Bolt Kit. Kit is for one manifold only.

 

	Kit Includes
QTY	Description	P/N
6	3/8-16 x 4 1/2" Bolt	08-010806222
2	3/8-16 x 2" Stud	08-130806121
2	3/8-16 x 1 3/4" Stud	08-130806111
4	3/8-16 Nut	08-200806001
12	3/8" AN S/S Washer	08-100800001
1	3/4 NPT to 1" Hose 90°	09-2016
4	3/4 NPT Pipe Plugs	09-2017
1	Riser Gasket	11-1004

Powerflow Small Block Kit with Stainless Risers

Powerflow now offers a small block system. This system is designed after the big block kit using the same riser system. This system will increase your torque and horsepower by 10%. This system is also available fully polished, too.

Powerflow manifolds are manufactured using the finest materials and most advanced techniques available. The high quality aluminum manifold castings feature water jackets that surround each exhaust passage, including the port, to eliminate the possibility of burn out.

 The outside manifold surfaces are then coated with the highest quality epoxy powder coating available, creating a part that not only is highly corrosion resistant, but good looking as well. Features an external fitting to accept stock MerCruiser thermostat plumbing.

PowerFlow Small Block Manifold and "A" Riser Kit (Sold in pairs)

To view and download the PDF line drawing Left Side  CLICK HERE

To view and download the PDF line drawing Right Side  CLICK HERE

To view and download the PDF water hose diagram  CLICK HERE

PowerFlow Small Block Manifold and "A" Riser Kit (Sold in pairs)

Shown with optional riser bung. These manifolds were designed for high horsepower 350 cid to 427 cid engines that are making 350 HP Plus. Manifolds have a 1 1/2" I.D. runner with a tall D port entry. The outlet is 3" with a stainless steel air straightened plate to direct exhaust into riser pipe for maximum scavenging. Manifolds will work with angled spark plugged heads or straight spark plugged heads. Also you can use tall valve covers for various rocker arm assemblies and stud girdle. Black manifolds are hard anodized prior to powder coat, to ensure against corrosion.

Weight savings of 65 lbs over cast iron and allows for twin installation down to 30" centers.

Small Block std. Stainless steel "A" risers are designed for stock Mercruiser Bravo exhaust tip locations. 3/4"npt fitting is used on front of pipe for thermostat housing that have (4) 1" hoses water to go to exhaust manifolds if needed click on (ADD BUNG). Shift bracket, ECM, or EFI brackets available as bolt on or welded to the risers. To order see PowerFlow accessories or click on "Related Products" on the right side of screen.

	Kit Includes
QTY	Description	P/N
2	PowerFlow Small Block Manifolds (Black)	02-1015
2	PowerFlow Small Block "A" Risers	01-6019
2	Small Block Manifold Gaskets	11-1009
2	PowerFlow Small Block Bolt Kits	2-8081

PowerFlow Small Block Manifold and "SA" Riser 3" Taller Kit (Sold in pairs)

To view and download the PDF line drawing Left Side  CLICK HERE

)

To view and download the PDF line drawing Right Side  CLICK HERE

To view and download the PDF water hose diagram  CLICK HERE

PowerFlow Small Block Manifold and "SA" Riser 3" Taller Kit (Sold in pairs)

Shown with optional riser bung. These manifolds were designed for high horsepower 350 cid to 427 cid engines that are making 350 HP Plus. Manifolds have a 1 1/2" I.D. runner with a tall D port entry. The outlet is 3" with a stainless steel air straightened plate to direct exhaust into riser pipe for maximum scavenging. Manifolds will work with angled spark plugged heads or straight spark plugged heads. Also you can use tall valve covers for various rocker arm assemblies and stud girdle. Black manifolds are hard anodized prior to powder coat, to ensure against corrosion.

Weight savings of 65 lbs over cast iron and allows for twin installation down to 30" centers.

Small Block 3" Stainless steel "A" risers are designed for stock location Mercruiser Bravo exhaust with 3" riser block between manifold & riser. Tip locations should be 3" higher then stock. 3/4"npt fitting is used on front of pipe for thermostat housing that have (4) 1" hoses water to go to exhaust manifolds if needed click on (ADD BUNG). Shift bracket, ECM, or EFI brackets available as bolt on or welded to the risers. To order see PowerFlow accessories or click on "Related Products" on the right side of screen..

	Kit Includes
QTY	Description	P/N
2	PowerFlow Small Block Manifolds (Black)	02-1015
2	PowerFlow Small Block "A"  3" Risers	01-6020
2	Small Block Manifold Gaskets	11-1009
2	PowerFlow Small Block Bolt Kits	2-8081

PowerFlow Small Block Manifold and "A" Riser Kit 6" Taller (Sold in pairs)
To view and download the PDF line drawing Left Side  CLICK HERE
To view and download the PDF line drawing Right Side  CLICK HERE
To view and download the PDF water hose diagram  CLICK HERE

PowerFlow Small Block Manifold and "A" Riser Kit 6" Taller (Sold in pairs)

Shown with optional riser bung. These manifolds were designed for high horsepower 350 cid to 427 cid engines that are making 350 HP Plus. Manifolds have a 1 1/2" I.D. runner with a tall D port entry. The outlet is 3" with a stainless steel air straightened plate to direct exhaust into riser pipe for maximum scavenging. Manifolds will work with angled spark plugged heads or straight spark plugged heads. Also you can use tall valve covers for various rocker arm assemblies and stud girdle. Black manifolds are hard anodized prior to powder coat, to ensure against corrosion.

Weight savings of 65 lbs over cast iron and allows for twin installation down to 30" centers.

Small Block 6" Stainless steel "A" risers are designed for stock location Mercruiser Bravo exhaust with 6" riser block between manifold & riser. Tip locations should be 6" higher then stock. 3/4"npt fitting is used on front of pipe for thermostat housing that have (4) 1" hoses water to go to exhaust manifolds if needed click on (ADD BUNG). Shift bracket, ECM, or EFI brackets available as bolt on or welded to the risers. To order see PowerFlow accessories or click on "Related Products" on the right side of screen..

	Kit Includes
QTY	Description	P/N
2	PowerFlow Small Block Manifolds (Polished)	02-1016
2	PowerFlow Small Block "A"  6" Risers	01-6021
2	Small Block Manifold Gaskets	11-1009
2	PowerFlow Small Block Bolt Kits	2-8081

PowerFlow Small Block Manifold and "S" Riser Kit
To view and download the PDF line drawing Left Side  CLICK HERE
To view and download the PDF line drawing Right Side  CLICK HERE
To view and download the PDF water hose diagram  CLICK HERE

PowerFlow Small Block Manifold and "S" Riser Kit

Shown with optional riser bung. These manifolds were designed for high horsepower 350 cid to 427 cid engines that are making 350 HP Plus. Manifolds have a 1 1/2" I.D. runner with a tall D port entry. The outlet is 3" with a stainless steel air straightened plate to direct exhaust into riser pipe for maximum scavenging. Manifolds will work with angled spark plugged heads or straight spark plugged heads. Also you can use tall valve covers for various rocker arm assemblies and stud girdle. Black manifolds are hard anodized prior to powder coat, to ensure against corrosion.

Weight savings of 65 lbs over cast iron and allows for twin installation down to 30" centers.

SMALL BLOCK std. Stainless steel "S" pipe is unique in many ways. These pipes will fit many pre-existing port locations That are about crankshaft center line, and is widely used with swim step applications as well as V-Drives and Jet boats.the lower elbow is adjustable up & down with a 4" exhaust tip hose contention.

3/4"npt fitting is used on front of pipe for thermostat housing that have (4) 1" hoses water to go to exhaust manifolds if needed click on (ADD BUNG). Shift bracket, ECM, or EFI brackets available as bolt on or welded to the risers. To order see PowerFlow accessories or click on "Related Products" on the right side of screen.

	Kit Includes
QTY	Description	P/N
2	PowerFlow Small Block Manifolds (Black)	02-1015
2	PowerFlow Small Block "S" Risers	01-6028
2	Small Block Manifold Gaskets	11-1009
2	PowerFlow Small Block Bolt Kits	2-8081

PowerFlow Small Block Manifold and "SA" Riser Kit (Sold in pairs)
To view and download the PDF line drawing Left Side  CLICK HERE
To view and download the PDF line drawing Right Side  CLICK HERE
To view and download the PDF water hose diagram  CLICK HERE

PowerFlow Small Block Manifold and "SA" Riser Kit (Sold in pairs)

Shown with optional riser bung. These manifolds were designed for high horsepower 350 cid to 427 cid engines that are making 350 HP Plus. Manifolds have a 1 1/2" I.D. runner with a tall D port entry. The outlet is 3" with a stainless steel air straightened plate to direct exhaust into riser pipe for maximum scavenging. Manifolds will work with angled spark plugged heads or straight spark plugged heads. Also you can use tall valve covers for various rocker arm assemblies and stud girdle. Black manifolds are hard anodized prior to powder coat, to ensure against corrosion.

Weight savings of 65 lbs over cast iron and allows for twin installation down to 30" centers.

Small Block std. Stainless steel "SA" riser pipes are designed for Mercruiser Silent Choice, Corsa Quick and Quiet (with modifications), and IMCO's Sound Advantage systems. They can also be used with our Aluminum "S" pipes part number 02-1225 for under swim step applications.

Shift bracket, ECM, or EFI brackets available as bolt on or welded to the risers. To order see PowerFlow accessories or click on "Related Products" on the right side of screen.

	Kit Includes
QTY	Description	P/N
2	PowerFlow Small Block Manifolds (Black)	02-1015
2	PowerFlow Small Block "SA"  Risers	01-6031
2	Small Block Manifold Gaskets	11-1009
2	PowerFlow Small Block Bolt Kits	2-8081

PowerFlow Small Block Manifold and "SA" Riser 3" Taller Kit (Sold in pairs)
To view and download the PDF line drawing Left Side  CLICK HERE
To view and download the PDF line drawing Right Side  CLICK HERE
To view and download the PDF water hose diagram  CLICK HERE

PowerFlow Small Block Manifold and "SA" Riser 3" Taller Kit

Shown with optional riser bung. These manifolds were designed for high horsepower 350 cid to 427 cid engines that are making 350 HP Plus. Manifolds have a 1 1/2" I.D. runner with a tall D port entry. The outlet is 3" with a stainless steel air straightened plate to direct exhaust into riser pipe for maximum scavenging. Manifolds will work with angled spark plugged heads or straight spark plugged heads. Also you can use tall valve covers for various rocker arm assemblies and stud girdle. Black manifolds are hard anodized prior to powder coat, to ensure against corrosion.

Weight savings of 65 lbs over cast iron and allows for twin installation down to 30" centers.

Small Block 3" Stainless steel "SA" riser pipes are designed to replace stock Mercruiser Bravo exhaust with 3" riser block between manifold & riser. 3/4"npt fitting is used on front of pipe for thermostat housing that have (4) 1" hoses water to go to exhaust manifolds if needed click on (ADD BUNG). Shift bracket, ECM, or EFI brackets available as bolt on or welded to the risers. To order see PowerFlow accessories. They can also be used with our Aluminum "S" pipes part number 02-1225 for under swim step applications.

Shift bracket, ECM, or EFI brackets available as bolt on or welded to the risers. To order see PowerFlow accessories or click on "Related Products" on the right side of screen.

	Kit Includes
QTY	Description	P/N
2	PowerFlow Small Block Manifolds (Black)	02-1015
2	PowerFlow Small Block "SA"  3" Risers	01-6032
2	Small Block Manifold Gaskets	11-1009
2	PowerFlow Small Block Bolt Kits	2-8081

PowerFlow Small Block Manifold and "SA" Riser 6" Taller Kit (Sold in pairs)
To view and download the PDF line drawing Left Side  CLICK HERE
To view and download the PDF line drawing Right Side  CLICK HERE
To view and download the PDF water hose diagram  CLICK HERE

PowerFlow Small Block Manifold and "SA" Riser 6" Taller Kit

Shown with optional riser bung. These manifolds were designed for high horsepower 350 cid to 427 cid engines that are making 350 HP Plus. Manifolds have a 1 1/2" I.D. runner with a tall D port entry. The outlet is 3" with a stainless steel air straightened plate to direct exhaust into riser pipe for maximum scavenging. Manifolds will work with angled spark plugged heads or straight spark plugged heads. Also you can use tall valve covers for various rocker arm assemblies and stud girdle. Black manifolds are hard anodized prior to powder coat, to ensure against corrosion.

Weight savings of 65 lbs over cast iron and allows for twin installation down to 30" centers.

Small Block 6" Stainless steel "SA" riser pipes are designed to replace stock Mercruiser Bravo exhaust with 6" riser block between manifold & riser. 3/4"npt fitting is used on front of pipe for thermostat housing that have (4) 1" hoses water to go to exhaust manifolds if needed click on (ADD BUNG). Shift bracket, ECM, or EFI brackets available as bolt on or welded to the risers. To order see PowerFlow accessories. They can also be used with our Aluminum "S" pipes part number 02-1225 for under swim step applications.

Shift bracket, ECM, or EFI brackets available as bolt on or welded to the risers. To order see PowerFlow accessories or click on "Related Products" on the right side of screen.

	Kit Includes
QTY	Description	P/N
2	PowerFlow Small Block Manifolds (Black)	02-1015
2	PowerFlow Small Block "SA"  6" Risers	01-6033
2	Small Block Manifold Gaskets	11-1009
2	PowerFlow Small Block Bolt Kits	2-8081

 

PowerFlow Small Block Manifold Kit Black (Sold in pairs)

PowerFlow Small Block Manifold Kit Black (Sold in pairs)

These manifolds were designed for big horsepower 350 cid to 427 cid engines that are making 350 HP Plus. Manifolds have a 1 1/2" I.D. runner with a tall D port entry. The outlet is 3" with a stainless steel air straightened plate to direct exhaust into riser for maximum scavenging. Manifolds will work with angled spark plugged heads or straight spark plugged heads. Also you can use tall valve covers for various rocker arm assemblies and stud girdle. Manifolds are available in black powder coated, hard anodized or polished in standard or recirc manifolds.

	Kit Includes
QTY	Description	P/N
2	PowerFlow Small Block Manifolds (Black)	02-1015
2	PowerFlow Small Block Bolt Kits	02-8081
2	Small Block Manifold Gaskets	11-1009
2	Small Block Manifold Riser Gaskets	11-1002