IMCO Marine Exhaust Systems - Tailpipes

Mercruiser Replacement Riser  (Sold in pairs)

Standard height thru transom and silent choice stainless steel riser pipes fit stock Mercruiser center rise manifolds, as well as Glenwood Magnaflow manifolds. These pipes have shown a performance gain of 9 horsepower in our dyno test over stock risers. (Sold in pairs)

All kits include all necessary mounting hardware and gaskets. Weld on or Bolt on brackets for Shift, ECM or EFI, see Merc Replacements Risers or Related Products.

Mercruiser Replacement Riser  (Sold in pairs)

6" taller thru transom and silent choice stainless steel riser pipes fit stock Mercruiser center rise manifolds, as well as Glenwood Magnaflow manifolds. These pipes have shown a performance gain of 9 horsepower in our dyno test over stock risers. (Sold in pairs)

All kits include all necessary mounting hardware and gaskets. Weld on or Bolt on brackets for Shift, ECM or EFI, see Merc Replacements Risers or Related Products.

Mercruiser Replacement Riser Standard Ht "A" (Sold in Pairs)

Standard height thru transom stainless steel riser pipes fit stock Mercruiser center rise manifolds, as well as Glenwood Magnaflow manifolds. These pipes have shown a performance gain of 9 horsepower in our dyno test over stock risers. (Sold in pairs) All kits include all necessary mounting hardware and gaskets. Weld on or Bolt on brackets available for Shift, ECM or EFI, see Merc Replacement Risers or Related Products.

Mercruiser Replacement Riser (Sold in pairs)

3" taller thru transom stainless steel riser pipes fit stock Mercruiser center rise manifolds, as well as Glenwood Magnaflow manifolds. These pipes have shown a performance gain of 9 horsepower in our dyno test over stock risers. (Sold in pairs)

All kits include all necessary mounting hardware and gaskets. Weld on or Bolt on brackets for Shift, ECM< or EFI, see Merc Replacement Risers or Related Products.

Mercruiser Replacement Riser  (Sold in pairs)

6" taller thru transom stainless steel riser pipes fit stock Mercruiser center rise manifolds, as well as Glenwood Magnaflow manifolds. These pipes have shown a performance gain of 9 horsepower in our dyno test over stock risers. (Sold in pairs)

All kits include all necessary mounting hardware and gaskets. Weld on or Bolt on brackets for shift, ECM or EFI, see Merc Replacement Risers or Related Products.

Big 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. 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 Related Products. pipes can also be used with our Aluminum "S" pipes part number 02-1225 for under swim step applications. (Sold in pairs)

When using these risers it's best to order 2 each 02-2242 oval hoses for the wishbone connection.

Big Block 3" Stainless Steel "SA" Riser Pipes (Pictured with optional bung)

Big 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 or Related Products. They can also be used with our Aluminum "S" pipes part number 02-1225 for under swim step applications. (Sold in pairs)

Big 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 or Related Products. They can also be used with our Aluminum "S" pipes part number 02-1225 for under swim step applications. (Sold in pairs)

Big Block 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 Related Products. (Sold in pairs)

Big Block 3" Stainless steel "A" risers are designed for stock 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 Related Products. (Sold in pairs)

Big Block 6" Stainless steel "A" risers are designed for stock 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. Sold in Pairs

Big 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 Related Products. (Sold in pairs)

Black PowerFlow Plus 30-deg Riser (Sold in pairs)

IMCO's innovative patented cast aluminum manifolds and risers are designed with 33" internal runners for those 510 and bigger cubic inch, naturally aspirated, or blown big block Chevy motors. Fully water-jacketed with NO water passing though the flange area of the manifold or riser pipe. Manifold has 2 1⁄4" primary runners they are equal to any tubular header on the market today. Dyno results have proven that PowerFlow Plus out performs most headers in torque, rpm, horsepower, and most of all longevity. Risers are available in three different configurations, three different heights, and two finishes Polished or Black. Black manifolds are hard coat anodized inside and out to withstand tough marine environments. All stainless steel tail pipes are custom made to your exact specifications. We also offer several different internal mufflers systems for you to choose. Please call IMCO for further information.

Black PowerFlow Plus 85-deg Riser (Sold in pairs)

IMCO's innovative patented cast aluminum manifolds and risers are designed with 33" internal runners for those 510 and bigger cubic inch, naturally aspirated, or blown big block Chevy motors. Fully water-jacketed with NO water passing though the flange area of the manifold or riser pipe. Manifold has 2 1⁄4" primary runners they are equal to any tubular header on the market today. Dyno results have proven that PowerFlow Plus out performs most headers in torque, rpm, horsepower, and most of all longevity. Risers are available in three different configurations, three different heights, and two finishes Polished or Black. Black manifolds are hard coat anodized inside and out to withstand tough marine environments. All stainless steel tail pipes are custom made to your exact specifications. We also offer several different internal mufflers systems for you to choose. Please call IMCO for further information.

Black PowerFlow Plus 90-deg Riser (Sold in pairs)

IMCO's innovative patented cast aluminum manifolds and risers are designed with 15" internal runners for those 510 and bigger cubic inch, naturally aspirated, or blown big block Chevy motors. Fully water-jacketed with NO water passing though the flange area of the manifold or riser pipe. Manifold has 2 1⁄4" primary runners they are equal to any tubular header on the market today. Dyno results have proven that PowerFlow Plus out performs most headers in torque, rpm, horsepower, and most of all longevity. Risers are available in three different configurations, three different heights, and two finishes Polished or Black. Black manifolds are hard coat anodized inside and out to withstand tough marine environments. All stainless steel tail pipes are custom made to your exact specifications. We also offer several different internal mufflers systems for you to choose. Please call IMCO for further information.

Polished PowerFlow Plus 30-deg Riser (shown with PowerFlow Plus Manifold) (Sold in pairs)

IMCO's innovative patented cast aluminum manifolds and risers are designed with 33" internal runners for those 510 and bigger cubic inch, naturally aspirated, or blown big block Chevy motors. Fully water-jacketed with 2 1⁄4" primaries, they are equal to any tubular header on the market today. Dyno results have proven that PowerFlow Plus out performs headers in torque, rpm, horsepower, and most of all longevity. Risers are available in three different configurations, three different heights, and two finishes Polished or Black. Black manifolds are hard coat anodized inside and out to withstand tough marine environments. All stainless steel tail pipes are custom made to your exact specifications. We offer several internal mufflers for you to choose. Please call IMCO for further information.

Polished PowerFlow Plus 85-deg Riser (Shown with PowerFlow Plus Manifold) (Sold in pairs)

IMCO's innovative patented cast aluminum manifolds and risers are designed with 33" internal runners for those 510 and bigger cubic inch, naturally aspirated, or blown big block Chevy motors. Fully water-jacketed with NO water passing though the flange area of the manifold or riser pipe. Manifold has 2 1⁄4" primary runners they are equal to any tubular header on the market today. Dyno results have proven that PowerFlow Plus out performs most headers in torque, rpm, horsepower, and most of all longevity. Risers are available in three different configurations, three different heights, and two finishes Polished or Black. Black manifolds are hard coat anodized inside and out to withstand tough marine environments. All stainless steel tail pipes are custom made to your exact specifications. We also offer several different internal mufflers systems for you to choose. Please call IMCO for further information.

Polished PowerFlow Plus 90-deg Riser (Shown with PowerFlow Plus Manifolds) (Sold in pairs)

IMCO's innovative patented cast aluminum manifolds and risers are designed with 15" internal runners for those 510 and bigger cubic inch, naturally aspirated, or blown big block Chevy motors. Fully water-jacketed with NO water passing though the flange area of the manifold or riser pipe. Manifold has 2 1⁄4" primary runners they are equal to any tubular header on the market today. Dyno results have proven that PowerFlow Plus out performs most headers in torque, rpm, horsepower, and most of all longevity. Risers are available in three different configurations, three different heights, and two finishes Polished or Black. Black manifolds are hard coat anodized inside and out to withstand tough marine environments. All stainless steel tail pipes are custom made to your exact specifications. We also offer several different internal mufflers systems for you to choose. Please call IMCO for further information.

Thumper Power Risers (Black)

IMCO's affordable alternative to stock cast iron Chevy risers. Our all cast aluminum risers will increase Horsepower, RPM, and Torque by 5 to 7% over stock cast iron manifolds and risers at a fraction of the cost. We have designed Thumper Power for everyone whether you're a high performance or family recreation boater. Kits are available for Chevy big block, small block, and V-6 motors. Available in black powder coated, optional hard anodized for corrosion (prior to powder coat), and polished. (SOLD IN PAIRS)

Shift, EFI, or ECM brackets sold separately.
When using these risers, it's best to order 2 each 02-2242 oval hoses for wishbone connections.

Thumper Power Risers (Polished) (Sold in pairs)

IMCO's affordable alternative to stock cast iron Chevy risers. Our all cast aluminum risers will increase Horsepower, RPM, and Torque by 5 to 7% over stock cast iron manifolds and risers at a fraction of the cost. We have designed Thumper Power for everyone whether you're a high performance or family recreation boater. Kits are available for Chevy big block, small block, and V-6 motors. Available in black powder coated, optional hard anodized for corrosion (prior to powder coat), and polished. (SOLD IN PAIRS)

Shift, EFI, or ECM brackets sold separately.
When using these risers, it's best to order 2 each 02-2242 oval hoses for wishbone connections.