Stainless Marine

• 1-1/4" Push on hose.
• 45 degree down slope.
• Can act as an outdrive cooling shower, when mounted above the drive.
  • Stainless Steel.

496 Hi-Torque Exhaust System

Stainless Marine now offers its time tested system for the 496, 8.1 Mercruiser Chevy engine. This is the same exhaust manifold that has proven itself time and time again both on the race circuit and on pleasure boats. It is designed with the Hi Torque in mind for both reliability and ease of installation. It, like all Stainless Marine products, carries the best warranty on the market along with the assurance that is made by a company known to stand behind their products.

496 Hi-Torque Exhaust System with High Performance Risers

Stainless Marine now offers its time tested system for the 496, 8.1 Mercruiser Chevy engine. This is the same exhaust manifold that has proven itself time and time again both on the race circuit and on pleasure boats. It is designed with the Hi Torque in mind for both reliability and ease of installation. It, like all Stainless Marine products, carries the best warranty on the market along with the assurance that is made by a company known to stand behind their products.

8.2L Hi-Torque Exhaust System with High Performance Risers with O2 Bung

Stainless Marine now offers its time tested system for the 8.2 Mercruiser Chevy engine. This is the same exhaust manifold that has proven itself time and time again both on the race circuit and on pleasure boats. It is designed with the Hi Torque in mind for both reliability and ease of installation. It, like all Stainless Marine products, carries the best warranty on the market along with the assurance that is made by a company known to stand behind their products.

Big Block 525 Merc EFI/700 Replacement Exhaust System (Standard Exit)   

Stainless Marine has been building quality marine exhaust systems for a number of years. So when theneed arose for a manifold option or solution for the popular Mercury racing 525/600 and 700 EFI enginesthey were right on top of it. Stainless marine has designed an exhaust pattern machining fixturethat when attached to the factory cylinder head will allow boring, drilling, machining and tapping of auxiliaryexhaust system attachment holes. These new holes will allow attachment of one of their traditional H/Pmanifold systems. Exhaust exits are designed for standard Bravo exit locations.

Note: Machining of Cylinder Heads is required to use these manifolds. A machining fixture is available for rent to facilitate this.

Big Block GM H/P Long Riser Kit

This system was designed for mildly modified factory engine packages. It shares the same features as the systems listed above, except its long tailpipe discharges water later in the exhaust stream. This provides some flexibility for mild cam shaft changes. Please consult us for cam shaft compatibility. A measurement sheet must be filled out when purchasing.

Big Block GM Hi-Torque Captains Call With Switchable Exhaust Riser compatibility

This kit comes with the same features as the standard kit, except that it has a riser designed to accommodate boats equipped with a switchable exhaust diverter. This is a remarkably easy installation and comes with all brackets and necessary hardware.

Industry wide, Stainless Marine exhaust systems are recognized for increased horsepower, remarkable weight savings, an exclusive five-year warranty and an incredible value.

Tests by both Hot Boat and Trailer Boat Magazines revealed increases of 3.2 to 6.5 MPH on MerCruiser Big Block powered 22'-24' boats.

The unique construction results in the heaviest manifold weighing only 23 pounds A huge savings compared to cast iron Stainless Marine is one of the top quality and least expensive systems available today. Note: All systems based on Bravo applications.

All kits include: Shift, Module, and an Oil Filter Bracket

Big Block GM Hi-Torque Dry System

This system is designed for heavilymodified engines with large cam shafts and/or high compression It will deliver maximumhorsepower and reliability on naturally aspiratedengines Keep in mind, all dry systems are very loud

Big Block GM Hi-Torque Standard Kit

The Hi-Torque manifolds feature state of the art design with a single wall internal casting that is enclosed in a press formed aluminum jacket creating a fully water cooled manifold. A highly polished stainless steel riser comes standard as well as bolts, gaskets and fittings. This system is also covered with an exclusive 5 year warranty.

Industry wide, Stainless Marine exhaust systems are recognized for increased horsepower, remarkable weight savings, an exclusive five-year warranty and an incredible value.

Tests by both Hot Boat and Trailer Boat Magazines revealed increases of 3.2 to 6.5 MPH on MerCruiser Big Block powered 22'-24' boats.

The unique construction results in the heaviest manifold weighing only 23 pounds A huge savings compared to cast iron Stainless Marine is one of the top quality and least expensive systems available today. Note: All systems based on Bravo applications.

All kits include: Shift, Module, and an Oil Filter Bracket

• 3 Nipple
• Stainless Steel.
• Designed for Chevrolet Engines.
• Positions the hose connections in front of the motor.

• 2 Nipple
• Stainless Steel.
• Designed for Chevrolet Engines.
• Positions the hose connections in front of the motor.

• Designed for 8-71/14-71 Kit with Bypass.
• Custom designed crossover kit.
• Starboard inlet available by special order, call for more info.
• 1-1/4" push on hose port inlet .
• Two 1-1/4" push on hose outlet.
• 3/8" NPT sender port.
• Bolts and Gaskets included.

• Big Block Chevy Port Inlet without Bypass.
• Experience horsepower gains of up to 15 horsepower while increasing water circulation.
• Kits come complete with all necessary bolts, gaskets, and hardware.
• Bypass systems use a thermostat while non-bypass doesn't.
• Starboard inlet available by special order.

• Custom designed crossover kit.
• Allows the use of a thermostat or a kit with no thermostat.
• Starboard inlet available by special order.

Gen III Oval Riser Gasket (Sold Each)

If you find yourself in need of maintenance accessories - we've got them! Gaskets, Clamps, Manifolds, Sealers.  We've got it all!

Gen III Oval Riser Gasket Open Center (Sold Each)

If you find yourself in need of maintenance accessories - we've got them! Gaskets, Clamps, Manifolds, Sealers.  We've got it all!

Gen III Tailpipe Gasket (Sold Each)

If you find yourself in need of maintenance accessories - we've got them! Gaskets, Clamps, Manifolds, Sealers.  We've got it all!