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   Diamond Performance Parts :: Exhaust Systems :: STAINLESS MARINE

We believe that the HI-TORQUE Manifold System is the best combination of horsepower increase, weight reduction and long life available in the entire marine industry today. We have recent official tests from HOT BOAT magazine and TRAILER BOAT magazine, which show an increase of 3.2 to 6.5 MPH on Big Block Mercruisers in 22' - 24' boats. The heaviest HI-TORQUE manifold weighs 23 pounds. Compare that to cast iron! Experience has shown that our 5 year limited warranty is justified. Our exclusive hybrid aluminum construction has been so sucessful that, in more than 10 years, we have yet to hear of an engine ruined by the failure of a HI-TORQUE MANIFOLD. Best of all, HI-TORQUE exhaust systems are priced lower than most other top level exhaust systems.

   STAINLESS MARINE   
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 525 Merc EFI/600sci/700sci Replacement Exhaust System
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525 Merc EFI/600sci/700sci Replacement Exhaust System
SKU: SKU17426

When the need arose for a manifold option or solution for the popular Mercury racing 525/600 and 700 EFI engines they were right on top of it. SM has designed an exhaust pattern machining fixture that when attached to the factory cylinder head will allow boring, drilling, machining and tapping o...

Our price: $3,950.00
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496 Hi-Torque Exhaust System
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496 Hi-Torque Exhaust System
SKU: SKU17465

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.

Our price: $3,300.00
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Stainless Marine Exhaust for BBC
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Stainless Marine Exhaust for BBC
SKU: 1210010

Stainless Marine Manifold and Riser Set for Big Block Chevy We believe that the HI-TORQUE Manifold System is the best combination of horsepower increase, weight reduction and long life available in the entire marine industry today.

Our price: $2,950.00

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Stainless Marine Hp 500 Taller Style Stainless Riser
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Stainless Marine Hp 500 Taller Style Stainless Riser
SKU: 01-1270010-00

Set Of BB Manifolds With Hp 500 Taller Style Stainless Riser Built To Fit

Our price: $3,475.00

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Big Block GM H/P Long Riser Kit
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Big Block GM H/P Long Riser Kit
SKU: SM454XL

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.

Our price: $3,400.00

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