Hardin Marine

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 4 "XS" Series Offshore Oil Pan

420-9105 + Option(s)

Big Block Chevy Gen 4 "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 4 "XS" Series Offshore Oil Pan - Complete Kit
Starting From:
$629.99
This Part has options, please click the button below to order.

Big Block Chevy Gen 4 "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.
  • 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 4 & 5 Timing Cover Gasket
Your Price:
$25.99

Big Block Chevy Gen 4 & 5 Timing Cover Gasket

300-17872

Big Block Chevy Gen 4 & 5 Timing Cover Gasket- 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 Gen 4 Oil Pan Bolt Kit
Your Price:
$27.99

Big Block Chevy Gen 4 Oil Pan Bolt Kit

620-52008

Stainless Steel Bolt Kits - B/B Chevy Gen 4 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 of


Big Block Chevy Gen 4, 2-piece Rear Main Seal
Your Price:
$19.99

Big Block Chevy Gen 4, 2-piece Rear Main Seal

300-16875

Big Block Chevy Gen 4, 2-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, 5 & 6 Front Seal
Your Price:
$16.99

Big Block Chevy Gen 4, 5 & 6 Front Seal

300-16872

Big Block Chevy Gen 4, 5 & 6 Front Seal- Sold Each

These excellent front timing cover seals are designed to replace worn, deteriorated original equipment seals and provide years of trouble free service

Sold Each


Big Block Chevy Gen 4/5 Timing Cover Bolt Kit
Your Price:
$17.99

Big Block Chevy Gen 4/5 Timing Cover Bolt Kit

620-52004

Stainless Steel Bolt Kits - B/B Chevy Gen 4/5 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 num


Big Block Chevy Gen 5 & 6 Side Entry Remote Cooler Sandwich Adapter
Your Price:
$99.99

Big Block Chevy Gen 5 & 6 Side Entry Remote Cooler Sandwich Adapter

625-7917

Big Block Chevy Gen 5 & 6 Side Entry Remote Cooler Sandwich Adapter

These unique adapters are used when a filter is desired to be used in a block mounted fashion. This unit lowers the original filter location by 1-1/2" while providing 3/4" NPT inlets and outlets. The factory oil by pass is eliminated in this situation.


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.