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.
Big Block GM 540 - Hi-Torque Gen III
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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 |
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Merc 496 Mag & HO and 525 - Hi-Torque System
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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.
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Big Block GM - Hi-Torque System
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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 |
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Big Block GM - Hi-Torque Captains Call
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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 |
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Big Block GM - H/P Long Riser Kit
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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 |
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Big Block GM - Hi-Torque Dry System
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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 |
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Small Block GM - Hi-Torque Standard System
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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 |
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Small Block GM - Hi-Torque Captains Call
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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. |
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Small Block GM - Long H/P Riser Kit
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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 |
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Small Block GM - Hi-Torque Dry System
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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.
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Hi-Torque Replacement Accessories
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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) |
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