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Big Block Chevy Gil Replacement Custom Dry Offshore System

Big Block Chevy Gil Replacement Custom Dry Offshore System

Big Block Chevy Gil Replacement Custom Dry Offshore System (Tailpipes built to your dimensions)

The dry exhaust system is designed for ultra hi-performance engines, especially those with high overlap cams.  The water jacketed pipes extend through the transom and keep the exhaust gasses dry all the way to the end.  More and more competitive offshore racers are using the Hardin Offshore Dry System.

Hardin Exhaust Systems perform better because they're made better, with great attention to detail in design, engineering and manufacturing.  These manifolds are coated inside and out, proven to protect better than conventional marine coatings.  These exhaust pipes are designed to keep cooling water separated from the exhaust flow to avoid corrosion of valves, rings and pistons.  And these exclusive patented Turbulator Rings have proven themselves in protecting engines against water ingestion due to condensation.

Hardin Exhaust Systems are the overwhelming choice of boaters who want top-end performance with durability.  These exhaust systems deliver by allowing your engine to breathe easier and perform better.  Boaters spend thousands of dollars to modify their engines to increase horsepower and speed.  But, unless the exhaust system is capable of the additional flow required, the modifications are wasted.

These exhaust systems allow center to center engine dimensions of 32-5/16" and are 1-5/8" taller than Mercury cast iron manifolds mounted on stock short decks with GM Heads.

Note:  Pricing indicated includes STANDARD DIMENSION Tailpipes only.  Custom Tailpipes may incur additional charges depending on the length and complexity of the tailpipe required.

Priced according to your dimensions.  Submit your custom measurements for a price quote.

Your Price: $0.00 
Part Number: 420-901010

Big Block Chevy Gil Replacement Custom Wet Offshore System

Big Block Chevy Gil Replacement Custom Wet Offshore System

Big Block Chevy Gil Replacement Custom Wet Offshore System (Tailpipes built to your measurements)

Hardin Marine Offshore Wet Systems are designed for hi-performance and stock engines.  This system mixes and discharges exhaust gasses with cooling water at the end of the exhaust pipe, and then a rubber hose connects up to your exhaust thru-hull ports.  Custom pipes are also available for custom installations and are priced by measurements given.  This same system is also used on Mercury hi-performance 525SC and HP500-engine packages as standard equipment from Mercury Hi-Performance.

Hardin Exhaust Systems perform better because they're made better, with great attention to detail in design, engineering and manufacturing.  These manifolds are Hardincoated inside and out, proven to protect better than conventional marine coatings.  These exhaust pipes are designed to keep cooling water separated from the exhaust flow to avoid corrosion of valves, rings and pistons.  And these exclusive patented Turbulator Rings have proven themselves in protecting engines against water ingestion due to condensation.

Hardin Exhaust Systems are the overwhelming choice of boaters who want top-end performance with durability.  These exhaust systems deliver by allowing your engine to breathe easier and perform better.  Boaters spend thousands of dollars to modify their engines to increase horsepower and speed.  But, unless the exhaust system is capable of the additional flow required, the modifications are wasted.

These exhaust systems allow center to center engine dimensions of 32-5/16" and are 1-5/8" taller than Mercury cast iron manifolds mounted on stock short decks with GM Heads.

Priced according to your dimensions. Submit your custom measurements for a price quote.

Your Price: $0.00 
Part Number: 420-901018-80

Big Block Chevy Gil Replacement Magnum Choice with Polished Risers

Big Block Chevy Gil Replacement Magnum Choice with Polished Risers

Big Block Chevy Gil Replacement Magnum Choice with Polished Risers

This is the easiest bolt on system for increasing horsepower and performance.  The kit includes shift, electrical and oil filter brackets for easy installation.  This system fits all MerCruiser small and big block Chevy engines equipped with MerCruiser Silent Choice systems.  This system will save up to 75 lbs. in weight over cast iron systems.  All manifolds are coated and built for power and long life.

Hardin Exhaust Systems perform better because they're made better, with great attention to detail in design, engineering and manufacturing.  These manifolds are Hardincoated inside and out, proven to protect better than conventional marine coatings.  These exhaust pipes are designed to keep cooling water separated from the exhaust flow to avoid corrosion of valves, rings and pistons.  And these exclusive patented Turbulator Rings have proven themselves in protecting engines against water ingestion due to condensation.

Hardin Exhaust Systems are the overwhelming choice of boaters who want top-end performance with durability.  These exhaust systems deliver by allowing your engine to breathe easier and perform better.  Boaters spend thousands of dollars to modify their engines to increase horsepower and speed.  But, unless the exhaust system is capable of the additional flow required, the modifications are wasted.

These exhaust systems allow center to center engine dimensions of 32-5/16" and are 1-5/8" taller than Mercury cast iron manifolds mounted on stock short decks with GM Heads.

Your Price: $2,499.99 
Part Number: 420-901030-POL

Big Block Chevy Gil Replacement Manifolds

Big Block Chevy Gil Replacement Manifolds

Big Block Chevy Gil Replacement Manifolds

These popular Gil Replacement manifolds are now available in Blue powdercoat as well as black! Sold in pairs and come complete with bolts, gaskets, and water inlet plumbing.

These exhaust systems allow center to center engine dimensions of 32-5/16" and are 1-5/8" taller than Mercury cast iron manifolds mounted on stock short decks with GM Heads.

Your Price: $1,899.99 
Part Number: 420-901180-GB

Big Block Chevy Gil Replacement Manifolds - Mercury Plumbing

Big Block Chevy Gil Replacement Manifolds - Mercury Plumbing

Big Block Chevy Gil Replacement Manifolds - Mercury Plumbing

These popular Gil Replacement manifolds are now available in Blue powdercoat as well as black! Sold in pairs and come complete with bolts, gaskets, and water inlet plumbing.

These exhaust systems allow center to center engine dimensions of 32-5/16" and are 1-5/8" taller than Mercury cast iron manifolds mounted on stock short decks with GM Heads.

Your Price: $1,899.99 
Part Number: 420-901180-MER

Big Block Chevy Gil Replacement TRS Standard Dry Offshore System

Big Block Chevy Gil Replacement TRS Standard Dry Offshore System

Big Block Chevy Gil Replacement TRS Standard Dry Offshore System

The dry exhaust system is designed for ultra hi-performance engines, especially those with high overlap cams.  The water jacketed pipes extend through the transom and keep the exhaust gasses dry all the way to the end.  More and more competitive offshore racers are using the Hardin Offshore Dry System.

Hardin Exhaust Systems perform better because they're made better, with great attention to detail in design, engineering and manufacturing.  These manifolds are Hardincoated inside and out, proven to protect better than conventional marine coatings.  These exhaust pipes are designed to keep cooling water separated from the exhaust flow to avoid corrosion of valves, rings and pistons.  And these exclusive patented Turbulator Rings have proven themselves in protecting engines against water ingestion due to condensation.

Hardin Exhaust Systems are the overwhelming choice of boaters who want top-end performance with durability.  These exhaust systems deliver by allowing your engine to breathe easier and perform better.  Boaters spend thousands of dollars to modify their engines to increase horsepower and speed.  But, unless the exhaust system is capable of the additional flow required, the modifications are wasted.

These exhaust systems allow center to center engine dimensions of 32-5/16" and are 1-5/8" taller than Mercury cast iron manifolds mounted on stock short decks with GM Heads.

Note:  Pricing indicated includes STANDARD DIMENSION Tailpipes only.  Custom Tailpipes may incur additional charges depending on the length and complexity of the tailpipe required.

Please call for price quotation.

Your Price: $0.00 
Part Number: 420-901012-SD

Big Block Chevy Gil Replacement TRS Wet Offshore System

Big Block Chevy Gil Replacement TRS Wet Offshore System

Big Block Chevy Gil Replacement TRS Wet Offshore System

Hardin Marine Offshore Wet Systems are designed for hi-performance and stock engines.  This system mixes and discharges exhaust gasses with cooling water at the end of the exhaust pipe, and then a rubber hose connects up to your exhaust thru-hull ports.  Custom pipes are also available for custom installations and are priced by measurements given.  This same system is also used on Mercury hi-performance 525SC and HP500-engine packages as standard equipment from Mercury Hi-Performance.

Hardin Exhaust Systems perform better because they're made better, with great attention to detail in design, engineering and manufacturing.  These manifolds are Hardincoated inside and out, proven to protect better than conventional marine coatings.  These exhaust pipes are designed to keep cooling water separated from the exhaust flow to avoid corrosion of valves, rings and pistons.  And these exclusive patented Turbulator Rings have proven themselves in protecting engines against water ingestion due to condensation.

Hardin Exhaust Systems are the overwhelming choice of boaters who want top-end performance with durability.  These exhaust systems deliver by allowing your engine to breathe easier and perform better.  Boaters spend thousands of dollars to modify their engines to increase horsepower and speed.  But, unless the exhaust system is capable of the additional flow required, the modifications are wasted.

These exhaust systems allow center to center engine dimensions of 32-5/16" and are 1-5/8" taller than Mercury cast iron manifolds mounted on stock short decks with GM Heads.
Your Price: $2,899.99 
Part Number: 420-901016-SD

Big Block Chevy Head Mount Coil Bracket

Big Block Chevy Head Mount Coil Bracket

  • Constructed from 6061-T6 billet aluminum.
  • Allows the ignition coil to be mounted to the cylinder head.
  • Coil clamp features a ridged, clamping-surface providing supreme coil retention.
  • Anodized for corrosion resistance.

Your Price: $62.99 
Part Number: 620-95620

Big Block Chevy Header Bolt Kit

Big Block Chevy Header Bolt Kit

Stainless Steel Bolt Kits - B/B Chevy Header Bolt Kit
We offer a full selection of manifold bolt kits to fit most popular marine engines.  These kits come complete with the correct number of bolts

Your Price: $26.99 
Part Number: 620-52002

Big Block Chevy Header Stepped 3/8" to 5/16" Studs Mounting Kit

Big Block Chevy Header Stepped Studs Mounting Kit 3/8" to 5/16"

Big Block Chevy Header Stepped 3/8" to 5/16" Studs Mounting Kit

We have thehard to find fasteners in order to make your installation a snap. Precisionground mounting studs along with high strength nuts and washers will provide thefinishing touch for your installation

1.25" overall length. 

Your Price: $59.99 
Part Number: 620-33105

Big Block Chevy Gil Replacement Hardin Exhaust System

Big Block Chevy HP500 Gil Replacement Hardin Exhaust System

Big Block Chevy Gil Replacement Hardin Exhaust System

Changes in the marketplace have inspired us to blend two fabulous manufactures  products into one dynamic exhaust offering, thus bringing the very best performance manifold system available anywhere. This offering  brings to you an extremely high quality exhaust system upgrade, at an incredibly affordable price.  This performance exhaust system is suitable for both carbureted and EFI applications up to 500HP.

Hardin Marine has taken its years of exhaust tailpipe technology and designed a new tailpipe to fit most common MerCruiser big block Chevy engine applications.  This new tailpipe is manufactured from all 316L stainless steel with the same high quality you've come to expect. By creating a tailpipe  designed to fit most standard "Bravo" tailpipe exit locations affordability is maximized.  We have coupled it to the infamous Hardin Offshore performance exhaust manifold/headers found as standard equipment on carbureted Mercury HP 500's and Mercury Racing 540 Bulldog Packages. This manifold has forever been the most sought after and attempted to be duplicated manifold in the performance marine exhaust industry. At last you can own the "Original" at a cost even less than the imitations.

Take note of the jumper hose that runs from the manifold up to the tailpipe.  This hose transfers the cooling water from the manifold to the tailpipe for discharge and keeps the water totally isolated from your engine.  Many other systems on the market use an inferior thru-flange system to pass the engine cooling water to the tailpipe with only a thin gasket to seal the passage.  A simple gasket failure could be a catastrophic event allowing your engine to ingest a large volume of water costing thousands of dollars in repairs.

These exhaust systems allow center to center engine dimensions of 32-5/16" and are 1-5/8" taller than Mercury cast iron manifolds mounted on stock short decks with GM Heads.

The system also includes the patented Hardin Turbulators which trap and vaporize condensation before it can be ingested through your exhaust valves.  This one simple device, will significantly increase your engines life expectancy and is only available with Hardin exhaust.  This system is a complete "bolt-on" solution to your performance exhaust needs and includes:

  • 1 pair Hardin Offshore Exhaust Manifolds
  • 1 pair Hardin Marine Offshore Tailpipes (polished)
  • 1 Shift Cable Bracket
  • 1 Electrical Bracket
  • 1 Oil Filter Bracket
  • 2 patented Hardin Turbulators
  • All gaskets, bolts and fittings necessary for installation
Your Price: $2,699.99 
Part Number: 420-901019

Big Block Chevy Intake Manifold Stainless Steel Allen Bolt Kit

Big Block Chevy Intake Manifold Stainless Steel Allen Bolt Kit

Big Block Chevy Intake Manifold Stainless Steel Allen Bolt Kit

We offer a full selection of intake manifold bolt kits to fit most popular marine engines. These kits come complete with the correct number of bolts and stainless steel washers. Don't install your new intake manifold with anything less.

Your Price: $26.99 
Part Number: 620-52001

Big Block Chevy Low Exit Gil Replacement Hardin Exhaust System

Big Block Chevy Low Exit Gil Replacement Hardin Exhaust System

Big Block Chevy Low Exit Gil Replacement Hardin Exhaust System

Changes in the marketplace have inspired us to blend two fabulous manufactures  products into one dynamic exhaust offering, thus bringing the very best performance manifold system available anywhere. This offering  brings to you an extremely high quality exhaust system upgrade, at an incredibly affordable price.  This performance exhaust system is suitable for both carbureted and EFI applications up to 500HP.

Hardin Marine has taken its years of exhaust tailpipe technology and designed a new tailpipe to fit most common MerCruiser big block Chevy engine applications.  This new tailpipe is manufactured from all 316L stainless steel with the same high quality you've come to expect. By creating a tailpipe  designed to fit most standard "Bravo" tailpipe exit locations affordability is maximized.  We have coupled it to the infamous Hardin Offshore performance exhaust manifold/headers found as standard equipment on carbureted Mercury HP 500's and Mercury Racing 540 Bulldog Packages. This manifold has forever been the most sought after and attempted to be duplicated manifold in the performance marine exhaust industry. At last you can own the "Original" at a cost even less than the imitations.

Take note of the jumper hose that runs from the manifold up to the tailpipe.  This hose transfers the cooling water from the manifold to the tailpipe for discharge and keeps the water totally isolated from your engine.  Many other systems on the market use an inferior thru-flange system to pass the engine cooling water to the tailpipe with only a thin gasket to seal the passage.  A simple gasket failure could be a catastrophic event allowing your engine to ingest a large volume of water costing thousands of dollars in repairs.

These exhaust systems allow center to center engine dimensions of 32-5/16" and are 1-5/8" taller than Mercury cast iron manifolds mounted on stock short decks with GM Heads.

The system also includes the patented Hardin Turbulators which trap and vaporize condensation before it can be ingested through your exhaust valves.  This one simple device, will significantly increase your engines life expectancy and is only available with Hardin exhaust.  This system is a complete "bolt-on" solution to your performance exhaust needs and includes:

  • 1 pair Hardin Offshore Exhaust Manifolds
  • 1 pair Hardin Marine Offshore Tailpipes (polished)
  • 1 Shift Cable Bracket
  • 1 Electrical Bracket
  • 1 Oil Filter Bracket
  • 2 patented Hardin Turbulators
  • All gaskets, bolts and fittings necessary for installation
Your Price: $2,699.99 
Part Number: 420-901020

Stainless Steel Thermostat Housing

Big Block Chevy Stainless Steel Mercruiser Thermostat Housing

  • For use in Big Block Chevy Mercruiser Applications
  • Constructed of Cast Stainless Steel.
  • Replaces factory black cast iron MerCruiser housing.
  • Designed to work in conjunction with the factory circulating pump.
  • Can be used in low profile applications such as EFI engines etc.
Your Price: $199.99 
Part Number: 410-1496

Big Block Chevy Standard Thickness Bolt Xtreme Marine Seal™ Valve Cover Gasket

Big Block Chevy Standard Thickness Bolt Xtreme Marine Seal Valve Cover Gasket

Big Block Chevy Standard Thickness Bolt Xtreme Marine Seal™ Valve Cover Gasket- Sold in Pairs

There is nothing more frustrating than a leaking valve cover seal, so don't settle for anything less than the best. That's why professional engine builders nationwide demand Xtreme Marine Seal valve cover gaskets. Produced from a blend of polymer and cork to provide a gasket that will last.

Sold in Pairs

Your Price: $25.99 
Part Number: 300-177

Big Block Chevy Steel Valve Cover Bolt Kit

Big Block Chevy Steel Valve Cover Bolt Kit

Stainless Steel Bolt Kits - B/B Chevy Steel Valve Cover Bolt Kit
We offer a full selection of manifold bolt kits to fit most popular marine engines.  These kits come complete with the correct number

Your Price: $16.99 
Part Number: 620-52006

Big Block Chevy Stock Replacement Fuel Pump

Big Block Chevy Stock Replacement Fuel Pump

  • Standard Marine Big Block Chevy Fuel Pump
  • 1/4" NPT In/Out
  • 1/4" Hose for Fuel Vent
Your Price: $129.99 
Part Number: 895-M60502

Big Block Chevy Tall Polished Plain Smooth Aluminum Valve Cover

Big Block Chevy Tall Polished Plain Smooth Aluminum Valve Cover

Big Block Chevy Tall Polished Plain Smooth Aluminum Valve Cover

Here is one of the hottest new designs in custom valve covers for big block Chevrolet engines. Each set comes in a highly polished finish. The valve covers will clear most stud girdles and roller rockers. The squared-off design may cause fit issues with center rise exhaust manifold systems, make sure to check available clearance before ordering. Baffle, breathers or caps are sold separately. These covers are 3-11/16" tall.

Your Price: $156.99 
Part Number: 620-70850

Big Block Chevy Thermostat Housing with Circulating Pump

Big Block Chevy Thermostat Housing with Circulating Pump

  • For BBC applications.
  • Cast Stainless Steel Thermostat Housing.
  • Replaces OEM Cast Iron MerCruiser Housing.
  • Designed to work in conjunction with the factory circulating pump.
  • Includes Bolts and Gaskets
Your Price: $229.99 
Part Number: 410-1494

Big Block Chevy Valve Cover Kit

Big Block Chevy Valve Cover Kit

Stainless Steel Bolt Kits - B/B Chevy Valve Cover Kit
We offer a full selection of manifold bolt kits to fit most popular marine engines.  These kits come complete with the correct number of bolts

Your Price: $16.99 
Part Number: 620-52005

Big Block Chevy Water Inlet Crossover Kit with Bypass

Big Block Chevy Water Inlet Crossover Kit with Bypass

  • Eliminate your power robbing circulating pump!
  • Constructed of 316L stainless steel.
  • One large 1" bypass hose for increased water volume.
  • Includes 142 degree thermostat.
  • Includes Crossover, Thermostat housing, 142 degree thermostat, hose with clamps, bolts & gaskets.
    Your Price: $289.99 
    Part Number: 620-300100

    Big Block Chevy with MSD Ignition Engine Harness

    Big Block Chevy with MSD Ignition Engine Harness

    Big Block Chevy with MSD Ignition Engine Harness

    These wiring harnesses were designed for use in custom engine installations that use an MSD Ignition Box. Don't suffer from a tangled spaghetti-wire nightmare. Both the custom and universal harnesses are engineered of the highest quality wire, connections, terminals, and components.

    Your Price: $159.60 
    Part Number: 620-08904

    Big Block Ford Header Bolt Kit

    Big Block Ford Header Bolt Kit

    Stainless Steel Bolt Kits - B/B Ford Header Bolt Kit
    We offer a full selection of manifold bolt kits to fit most popular marine engines.  These kits come complete with the correct number of bolts

    Your Price: $26.99 
    Part Number: 620-52102

    Big Block Ford Intake Manifold Stainless Steel Allen Bolt Kit

    Big Block Ford Intake Manifold Stainless Steel Allen Bolt Kit

    Big Block Ford 429/460 Intake Manifold Stainless Steel Allen Bolt Kit

    We offer a full selection of intake manifold bolt kits to fit most popularmarine engines. These kits come complete with the correct number of bolts andstainless steel washers. Don't install your new intake manifold with anythingless.

    Your Price: $30.99 
    Part Number: 620-52101

    Big Block Ford Steel Valve Cover Bolt Kit

    Big Block Ford Steel Valve Cover Bolt Kit

    Stainless Steel Bolt Kits - B/B Ford Steel Valve Cover Bolt Kit
    We offer a full selection of manifold bolt kits to fit most popular marine engines.  These kits come complete with the correct number

    Your Price: $16.99 
    Part Number: 620-52104

    Big/Small Block Chevy Gen 4 Thermostatically Controlled Engine Block Adapter

    Big/Small Block Chevy Gen 4 Thermostatically Controlled Engine Block Adapter

    Big/Small Block Chevy Gen 4 Thermostatically Controlled Engine Block Adapter

    Thermostatically Controlled Engine Block Adapter Gen 4 BBC / SBC

    Maintaining proper engine oil temperature has become critical to the success or failure of today’s performance marine engines. Prolonged use of marine engines in conditions where oil cannot reach its optimum working temperatures will result in sludge formation and crankcase dilution which leads to excessive wear especially in the cylinder bores and bearing surfaces. A thermostat assembly combats this by permitting 90% of the engines oil to bypass the cooler during warm up. The balance of the oil flow is allowed to fl ow through the cooler maintaining constant pressure and preventing air pockets while eliminating cold oil shock. This reduces scuffing and premature wear and inhibits engine blow-by. As engine oil temperature reaches its optimum operating temperature moisture and impurities that often cause a milky condition are eliminated.

    Until now oil temp was controlled either by some guess of components or by the professional engine builders through the use of some sort of external engine oil thermostat. While these external oil filter/ thermostats were very effective they were also very large and very bulk . Making them hard to mount and creating a maze of plumbing. The problem was the only available parts up until now couldn’t move the necessary oil fl ow to be mounted anywhere. else. But thanks to Hardin marine and their engineering staff they took to solving this decade long nuisance. Hardin Marine has developed this new thermostatically controlled engine block mounted product. With this unit all oil temperature is now controlled through a integral oil thermostat. The large 3/4NPT oil inlets/outlets assure the maximum amount of oil can be fl owed through the unit. So no more maze of external plumbing, no more big bulky external mounted components just the standard (2) lines to the filter and the standard (2) lines to your cooler. Sometimes evolution comes in the form of the simplest of things but this is one that has been deeply sought after. Overall Height: 4-3/4"
    Your Price: $299.99 
    Part Number: 625-7703

    Bilge

    Bilge "J" Drain- Self-Bailing- Satin Finish Billet Aluminum

    Satin Finish Billet Aluminum Self-Bailing "J" Drain

    These billet aluminum self-bailing bilge drains are designed to attach to the back of the hull over the drain hole.  By incorporating a one-way rubber style flap they allow water to exit the boat while underway, yet restrict the water from entering the while stopped.

    This drain measures 2" X 2" with a 1-1/2" center drain hole
    Your Price: $26.99 
    Part Number: 125-57505

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