Hardin Marine

Big Block Chevy Gen 5 & 6 Thermostatically Controlled Engine Block Adapter
Your Price:
$279.99

Big Block Chevy Gen 5 & 6 Thermostatically Controlled Engine Block Adapter

625-7704

Big Block Chevy Gen 5 & 6 Thermostatically Controlled Engine Block Adapter

Thermostatically Controlled Engine Block Adapter Gen 5/6 BBC

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 212 degree 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"



Big Block Chevy Gen 5 & 6 1-piece Rear Main Seal
Your Price:
$28.99

Big Block Chevy Gen 5 & 6 1-piece Rear Main Seal

300-16876

Big Block Chevy Gen 5 & 6 1-piece Rear Main Seal- Sold Each

These excellent rear main seals are designed to replace worn, deteriorated original equipment seals and provide years of trouble free service

Sold Each


Big Block Chevy Gen 4 "XS" Series Offshore Oil Pan
Starting From:
$549.99
This Part has options, please click the button below to order.

Big Block Chevy Gen 5/6 "XS" Series Offshore Oil Pan

420-9105 + Option(s)

Big Block Chevy Gen 5/6 "XS" Series Offshore Oil Pan - (Pan, oil pick-up & windage tray only)

The "XS" Xtreme Series 4-5/8" stroker oil pans are competition tested and race proven. They out perform all other pans available. Each pan starts out jig formed and precision TIG welded, then an exclusive race proven windage tray is added which prevents oil foaming and crankshaft windage, which helps to build more horsepower. Next a high volume oil pump pick-up with a support bracket is added. The entire pan is coated with a hardened aerospace epoxy to resist stains and corrosion. Designed to clear most front style engine mounts including MerCruiser. A simple comparison of available marine oil pans clearly points out Hardin Marine oil pans are boat lengths ahead of all other oil pans. Run what leading racers worldwide already use - the Hardin Marine "XS" Xtreme Series offshore oil pan.


Big Block Chevy Gen 5/6 "XS" Series Offshore Oil Pan Kit
Starting From:
$629.99
This Part has options, please click the button below to order.

Big Block Chevy Gen 5/6 "XS" Series Offshore Oil Pan Kit

620-9105 + Option(s)

  • Reinforced Sea Pump/Alternator Adjusting Bracket Tab.
  • Extra Large 10 qt. (8.9" Deep), 12 qt. (10" deep) pans and 14 qt (10.18" deep)
  • Pan rear support spacers provided added clearance to mounting fasteners.
  • 1/4" NPT threaded flexible dipstick provides a leak proof seal between dipstick and pan.
  • Heavy duty pan rails are notched to allow 4-5/8" stroke rotating assemblies.
  • "T" bottom style offers additional oil capacity storage for constant supply to the engine oil pickup.
  • Zinc plated one-piece windage tray and crank scraper prevents oil foaming, building more power than other brands.
  • Highly flexible dipstick allows accessibility around engine mounts and exhaust systems.
  • Oil relief in kick out allows added room for long filters and sandwich adapters.
  • Fully gusseted high-flow oil pick-up included.
  • Includes mounting bolt kit.
  • Welded for durability.
  • 1/2"-20 drain plug.

Big Block Chevy Gen 5/6 Oil Pan Bolt Kit
Your Price:
$27.99

Big Block Chevy Gen 5/6 Oil Pan Bolt Kit

620-52007

Stainless Steel Bolt Kits - B/B Chevy Gen 5/6 Oil Pan 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 o


Big Block Chevy Gen 6 O-ring Xtreme Marine Seal™ Valve Cover Gasket
Your Price:
$32.99

Big Block Chevy Gen 6 O-ring Xtreme Marine Seal Valve Cover Gasket

300-17937

Big Block Chevy Gen 6 O-ring 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


Big Block Chevy Gen 6 Timing Cover Bolt Kit
Your Price:
$15.99

Big Block Chevy Gen 6 Timing Cover Bolt Kit

620-52003

Stainless Steel Bolt Kits - B/B Chevy Gen 6 Timing 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 numbe


Big Block Chevy Gen 6 Timing Cover O-ring
Your Price:
$19.99

Big Block Chevy Gen 6 Timing Cover O-ring

300-17870

Big Block Chevy Gen 6 Timing Cover O-ring- Sold Each

These Hardin Marine Sea timing/front cover gaskets are designed to exceed all original equipment specifications. Each gasket is precision die-cut for a perfect fit every time.

Sold Each


Big Block Chevy Generation 4 Sea Pump Pulley
Your Price:
$154.99

Big Block Chevy Generation 4 Sea Pump Pulley

625-4024

Big Block Chevy Generation 4 Sea Pump Pulley (Mandrel not needed)

All Hardin Marine sea pump pulleys for Gen 4 &; 5 V-groove belts use amandrel on the pump, then the pulley bolts to the mandrel. Somemanufacturers sell you a press-on pulley, these usually work themselves off.

Pulley diameter of 6.5".


Big Block Chevy Generation 5 Sea Pump Pulley
Your Price:
$89.99

Big Block Chevy Generation 5 Sea Pump Pulley

421-205

Big Block Chevy Generation 5 Sea Pump Pulley (Needs Mandrel To Mount)

All Hardin Marine sea pump pulleys for Gen 4 & 5 V-groove belts use a mandrel on the pump, then the pulley bolts to the mandrel. Some manufacturers sell you a press-on pulley, these usually work themselves off.

Pulley has the diameter of 5.5".


Big Block Chevy Generation 5 Sea Pump Pulley
Your Price:
$189.99

Big Block Chevy Generation 5 Serpentine Sea Pump Pulley

421-212

Big Block Chevy Generation 5 Serpentine Sea Pump Pulley (Needs Mandrel To Mount)

All Hardin Marine sea pump pulleys for Gen 4 & 5 V-groove belts use a mandrel on the pump, then the pulley bolts to the mandrel. Some manufacturers sell you a press-on pulley, these usually work themselves off.


Big Block Chevy Gil Replacement Aluminum Riser System
Your Price:
$1,999.99

Big Block Chevy Gil Replacement Aluminum Riser System

420-901045

Big Block Chevy Gil Replacement Aluminum Riser 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 Hardin 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.


Big Block Chevy Gil Replacement Bravo Standard Dry Offshore System
Your Price:
$2,899.99

Big Block Chevy Gil Replacement Bravo Standard Dry Offshore System

420-901014-SD

Big Block Chevy Gil Replacement Bravo 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.


Big Block Chevy Gil Replacement Bravo Wet Offshore System
Your Price:
$2,499.99

Big Block Chevy Gil Replacement Bravo Wet Offshore System

420-901018-SD

Big Block Chevy Gil Replacement Bravo 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.

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


Big Block Chevy Gil Replacement Custom Dry Offshore System
Your Price:
$0.00

CALL TO ORDER

Big Block Chevy Gil Replacement Custom Dry Offshore System

420-901010

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.


Big Block Chevy Gil Replacement Custom Wet Offshore System
Your Price:
$0.00

Big Block Chevy Gil Replacement Custom Wet Offshore System

420-901018-80

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.


Big Block Chevy Gil Replacement Magnum Choice with Polished Risers
Your Price:
$2,499.99

Big Block Chevy Gil Replacement Magnum Choice with Polished Risers

420-901030-POL

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.


Big Block Chevy Gil Replacement Manifolds
Your Price:
$1,899.99

Big Block Chevy Gil Replacement Manifolds

420-901180-GB

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.


Big Block Chevy Gil Replacement Manifolds - Mercury Plumbing

Your Price:
$1,899.99

Big Block Chevy Gil Replacement Manifolds - Mercury Plumbing

420-901180-MER + Option(s)

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.


Big Block Chevy Gil Replacement TRS Standard Dry Offshore System
Your Price:
$0.00

CALL TO ORDER

Big Block Chevy Gil Replacement TRS Standard Dry Offshore System

420-901012-SD

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.


Big Block Chevy Gil Replacement TRS Wet Offshore System
Your Price:
$2,899.99

Big Block Chevy Gil Replacement TRS Wet Offshore System

420-901016-SD

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.

Big Block Chevy Head Mount Coil Bracket
Your Price:
$62.99

Big Block Chevy Head Mount Coil Bracket

620-95620

  • 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.


Big Block Chevy Header Bolt Kit
Your Price:
$26.99

Big Block Chevy Header Bolt Kit

620-52002

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


Big Block Chevy Header Stepped 3/8" to 5/16" Studs Mounting Kit
Your Price:
$59.99

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

620-33105

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. 


Big Block Chevy Gil Replacement Hardin Exhaust System
Your Price:
$2,699.99

Big Block Chevy HP500 Gil Replacement Hardin Exhaust System

420-901019

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

Big Block Chevy Intake Manifold Stainless Steel Allen Bolt Kit
Your Price:
$26.99

Big Block Chevy Intake Manifold Stainless Steel Allen Bolt Kit

620-52001

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.


Big Block Chevy Low Exit Gil Replacement Hardin Exhaust System
Your Price:
$2,699.99

Big Block Chevy Low Exit Gil Replacement Hardin Exhaust System

420-901020

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