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Stainless Marine Exhaust:

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.

Click on the part number to check pricing or place an order.

Big Block GM 540
Hi-Torque Gen III
These systems are incredible performers. They hold both APBA catamaran and V-bottom records. This system has recorded speeds in excess of 160 MPH and is designed for the person looking for true header performance with reliability of a manifold system. This system is designed for large cubic inch and supercharged motors.
Part No. Description
520-SM540K45 GM Big Block, 4.5" tailpipe, 540 cu. in. and over
520-SM540K50 GM Big Block, 5" tailpipe, 600 cu. in. and over
Merc 496 Mag & HO
Hi-Torque 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.

Part No. Description
520-49600 496 Hi-Torque System
Big Block GM
Hi-Torque System

The Hi-Torque manifolds features state of the art design with single wall internal castings that are enclosed with an aluminum press formed jacket creating a fully water cooled manifold. A highly polished stainless riser comes standard as well as bolts, gaskets and fittings. This system also comes with an exclusive 60 month limited warranty.

Part No. Description
520-SM454K Standard GM Big Block Kit
Big Block GM
Hi-Torque Captains Call

This kit comes with the same features as the standard kit above, 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.

Part No. Description
520-SM454KS

Big Block GM system with Switchable
Exhaust Riser Compatibility

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.

Part No. Description
520-SM454KXL GM Big Block Kit with Long H/P Risers
Big Block GM
Hi-Torque Dry System
This system is designed for heavily modified engines with large cam shafts and/or high compression. It will deliver maximum horsepower and reliability on naturally aspirated engines. Keep in mind, all dry systems are very loud.
Part No. Description
520-SM454KR GM Big Block Hi-Torque Dry System
Small Block GM
Hi-Torque Standard System

The Hi-Torque manifolds feature state of the art design with single wall internal castings that are enclosed with an aluminum press formed jacket creating a fully water cooled manifold. A highly polished stainless riser comes standard as well as bolts, gaskets and fittings. This system also comes with an exclusive 60 month limited warranty.

Part No. Description
520-SM350K Small Block GM Standard Kit
Small Block GM
Hi-Torque Captains Call

This system shares the same great features as the 520-SM350K except that this system allows the use of a captain's call type system to be used. The risers are built especially for this application. Like the standard kit, this system comes complete. Not recommended for large camshaft engines.

Part No. Description
520-SM350KS Small Block GM System with Switchable
Diverter Compatible Riser.
Small Block GM
Long H/P Riser Kit

This system was designed for mildly modified small block engines. It shares the same features as the 520-SM350K listed above, except that it's tailpipe discharges water later in the exhaust stream which provides some flexibility for mild camshaft changes. Consult us for camshaft compatibility.

Part No. Description
520-SM350KXL Small Block Kit with Long H/P Riser
Small Block GM
Hi-Torque Dry System
This system was designed for highly modified small block engines with large camshafts and/or high compression. This system delivers maximum performance and reliability. Keep in mind, all dry systems are very loud.
Part No. Description
520-SM350KR Small Block dry kit
Hi-Torque Replacement Accessories
 

 

 If you find yourself in need of maintenance accessories - we've got them!  Gaskets, Clamps, Manifolds, Sealers.  We've got it all!
Part No. Description
520-SM404 Hi-Torque Replacement Riser Gasket
520-SM444 Hi-Torque Hi-Temp Gasket Sealer
520-SM405 Hi-Torque Replacement Riser Clamp
300-1410 Hi-Torque Replacement Big Block Manifold Gaskets
300-1404 Hi-Torque Replacement Small Block Manifold Gaskets
520-35000 Hi-Torque Replacement Small Block Manifolds Only (pair)
520-45400 Hi-Torque Replacement Big Block Manifolds Only (pair)