Hardin Marine

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

Big Block Chevy Mercruiser Style Engine Harness For MSD Ignition
Your Price:
$229.99

Big Block Chevy Mercruiser Style Engine Harness For MSD Ignition

620-08904

Big Block Chevy Mercruiser Style Engine Harness For MSD Ignition

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.

Note: Uses 14 AWG wire


Big Block Chevy Round Port SS Exhaust Gaskets
Your Price:
$44.99

Big Block Chevy Round Port SS Exhaust Gaskets

655-4815

Big Block Chevy Round Port SS Exhaust Gaskets -Sold Each

  • Multi-Layered Steel (MLS) Marine Exhaust Gaskets are designed for extreme duty applications as well as high cylinder pressures produced by high horsepower applications. Perfect for high compression, super-charged, or turbo-charged,engines.
  • Manufactured from three 304 stainless steel layers, resists corrosion, will not burn through or push out and maintains maximum fastener torque retention
  • Stress formed inner and outer layer embossments act like springs that rebound under exhaust flange clamp load, creating force to seal excessive exhaust pressure produced from cylinder heads
  • Withstands different combination's of cylinder head (aluminum) and exhaust header or manifold (steel) materials, will not deteriorate from scrubbing action caused by different expansion rates in aluminum and steel material

Sold Each


Big Block Chevy Square Port SS Exhaust Gaskets
Your Price:
$34.99

Big Block Chevy Square Port SS Exhaust Gaskets

655-4816

Big Block Chevy Square Port SS Exhaust Gaskets-Sold in Pairs

  • Multi-Layered Steel (MLS) Marine Exhaust Gaskets are designed for extreme duty applications as well as high cylinder pressures produced by high horsepower applications. Perfect for high compression, super-charged, or turbo-charged,engines.
  • Manufactured from three 304 stainless steel layers, resists corrosion, will not burn through or push out and maintains maximum fastener torque retention
  • Stress formed inner and outer layer embossments act like springs that rebound under exhaust flange clamp load, creating force to seal excessive exhaust pressure produced from cylinder heads
  • Withstands different combination's of cylinder head (aluminum) and exhaust header or manifold (steel) materials, will not deteriorate from scrubbing action caused by different expansion rates in aluminum and steel material

Sold in Pairs


Stainless Steel Thermostat Housing
Your Price:
$213.99

Big Block Chevy Stainless Steel Mercruiser Thermostat Housing

410-1496

  • 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.
Works with Mercruiser 860256A4 MCM & MIE V6 – V8 (305&350cid) w/Bravo Drive

Big Block Chevy Standard Thickness Bolt Xtreme Marine Seal™ Valve Cover Gasket
Your Price:
$25.99

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

300-177

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


Big Block Chevy Steel Valve Cover Bolt Kit
Your Price:
$16.99

Big Block Chevy Steel Valve Cover Bolt Kit

620-52006

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


Big Block Chevy Stock Replacement Fuel Pump
Your Price:
$139.99

Big Block Chevy Stock Replacement Fuel Pump

895-M60502

  • Standard Marine Big Block Chevy Fuel Pump
  • 1/4" NPT In/Out
  • 1/4" Hose for Fuel Vent

Big Block Chevy Tall Polished Plain Smooth Aluminum Valve Cover
Your Price:
$156.99

Big Block Chevy Tall Polished Plain Smooth Aluminum Valve Cover

620-70850

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.


Big Block Chevy Valve Cover Kit
Your Price:
$16.99

Big Block Chevy Valve Cover Kit

620-52005

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


Big Block Chevy Water Inlet Crossover Kit with Bypass
Your Price:
$289.99

Big Block Chevy Water Inlet Crossover Kit with Bypass

620-300100

  • 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.

    Big Block Ford Fuel Pump and Regulator Kit
    Your Price:
    $249.99

    Big Block Ford Fuel Pump and Regulator Kit

    620-460

    Combine and Save with this Fuel Pump and Regulator Combo Kit. This kit includes a High Performance mechanical fuel pump and a Holley 12-803 Chrome Fuel pressure regulator. 1/2"NPT inlet/outlet and 130 GPH rated.

    Big Block Ford Header Bolt Kit
    Your Price:
    $26.99

    Big Block Ford Header Bolt Kit

    620-52102

    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


    Big Block Ford Intake Manifold Stainless Steel Allen Bolt Kit
    Your Price:
    $30.99

    Big Block Ford Intake Manifold Stainless Steel Allen Bolt Kit

    620-52101

    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.


    Big Block Ford Steel Valve Cover Bolt Kit
    Your Price:
    $16.99

    Big Block Ford Steel Valve Cover Bolt Kit

    620-52104

    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


    Big/Small Block Chevy Gen 4 Thermostatically Controlled Engine Block Adapter
    Your Price:
    $299.99

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

    625-7703

    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 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"

    Bilge "J" Drain- Self-Bailing- Satin Finish Billet Aluminum
    Your Price:
    $26.99

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

    125-57505

    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

    Bilge Blower - 3" Inlet/Outlet
    Your Price:
    $24.99

    Bilge Blower - 3" Inlet/Outlet

    620-70303

    3" Inlet/Outlet - 8" Long X 3-1/4" Wide X 4-1/2" High 130 CFM

    Easy install bilge blower, is long-lasting and efficient at exhausting fumes from an engine compartment. This bilge blower is water and corrosion resistant. It has been sealed and the connection shave been shrink wrapped. The bilge blower's blade has been design to be extremely quiet. This bilge blower meets and/or exceeds the safety standard of ABYC, CE, NMMA, and USCG. Suggested use with an 8 amp fuse.<


    Bilge Blower - 4" Inlet/Outlet
    Your Price:
    $32.99

    Bilge Blower - 4" Inlet/Outlet

    620-70304

    4" Turbo In-Line Blower

    • Nickel Plated Motor Can for Greater Corrosion Resistance
    • Stiffening Ribs to Reduce Housing Distortion
    • Motor Cap Seals Wires and Motor for Better Water Resistance
    • Low Amp Draw Motor, for Longer Blower and Battery Life
    • Tabs on Intake and Exhaust Hold Ventilation Hose/Clamp Firmly in Place
    • Five-Blade for Maximizes Airflow and Efficiency
    • Caulked, Tinned Wires for Improved Corrosion Resistance
    • Built-In Mounting Feet Allow Easy Vertical or Horizontal Install
    • Hose Connection: 4” OD

    Billet 4150 Standard Holley Regulator/Throttle Cable Bracket
    Your Price:
    $69.00

    Billet 4150 Standard Holley Regulator/Throttle Cable Bracket

    755-5127

    Billet 4150 Standard Holley Regulator/Throttle Cable Bracket

    This billet throttle cable mount is manufactured from 6061-T6 billet aluminum and black hardcoat anodized for both strength and corrosion resistance.  This single carb version offers a plate form to the side of the carburetor that a fuel regulator and plumbing can be attached for convenience.


    Billet 454 / 502 Serpentine Circ Pump Pulley
    Your Price:
    $179.99

    Billet 454 / 502 Serpentine Circ Pump Pulley

    421-211

    • Made from Billet Aluminium
    • FITS Hardin Pump Eliminator Crossover or Stock Mercury Pump
    • 1-3/4" Bolt Circle
    • Polished Finish
    • 4 Bolt Mount
    • Smooth Belt Running Surface
    • 6" Diameter
    • 1-1/8" Belt Surface Height
    • 1-1/2" Overall Height


    Billet Aluminum "ST" Control
    Your Price:
    $75.00

    Billet Aluminum "ST" Control

    615-125-SL35BK

    Billet Aluminum "ST" Control - Black

    • Available: (1) One
    • Condition: Minor abrasions on the powdercoating

    These attractive billet aluminum "ST" controls are a great upgrade from your chrome style "ST" control These controls are precision machined to be a direct replacement of standard "ST" controls and offer a modern updated appearance to any boat.


    Billet Aluminum "ST" Control

    Your Price:
    $98.99

    Billet Aluminum "ST" Control

    125-SL-35 + Option(s)

    Billet Aluminum "ST" Control

    These attractive billet aluminum "ST" controls are a great upgrade from your chrome style "ST" control These controls are precision machined to be a direct replacement of standard "ST" controls and offer a modern updated appearance to any boat.


    Billet 3/4" Low Profile Steering Shaft Adapter
    Your Price:
    $25.99

    Billet Aluminum 3/4" Low Profile Steering Shaft Adapter

    620-243101

    Billet Aluminum 3/4" Low Profile Steering Shaft Adapter

    These 2-1/2" OD small diameter low profile steering shaft Adapters work great on any boat. They accept tall 3/4" round tapered shafts and provide a 3-bolt steering wheel mounting flange. Center line on the three bolt holes is 1-3/4"


    Stainless Steel 6-Bolt One-Piece Steering Wheel Adapter - 1.85"
    Your Price:
    $115.68

    Billet Aluminum 6-Bolt One-Piece Steering Wheel Adapter - 3.85"

    137-9105

    • Polished Billet Aluminium
    • Fits 3/4" Tapered Shaft with Keyway.
    • Positions Steering Wheel Mount Point Approx. 6" off Dash.
    • 6-Bolt Momo and Dino Bolt Patterns
    • Momo bolt pattern 2-3/4" center to center across.
    • Dino bolt pattern 2-7/8" center to center across.
    • 3.40" Outside Diameter, 2.38" Shaft Diameter, 3.85" Overall Height

    Stainless Steel 6-Bolt One-Piece Steering Wheel Adapter - 1.85"
    Your Price:
    $149.99

    Billet Aluminum 6-Bolt One-Piece Steering Wheel Adapter - 5.85"

    137-9106

    • Polished Billet Aluminum
    • Fits 3/4" Tapered Shaft with Keyway.
    • Positions Steering Wheel Mount Point Approx. 8" off Dash.
    • 6-Bolt Momo and Dino Bolt Patterns
    • Momo bolt pattern 2-3/4" center to center across.
    • Dino bolt pattern 2-7/8" center to center across.
    • 3.40" Outside Diameter, 2.38" Shaft Diameter, 5.85" Overall Height

    Billet Aluminum Accent Knob For "ST" Controls

    Your Price:
    $16.99

    Billet Aluminum Accent Knob For "ST" Controls

    125-30-K + Option(s)

    Billet Aluminum Accent Knob For "ST" Controls

    These precision machined billet aluminum knobs are a perfect way to accent some color into your boat. The knobs are a standard "ST" thread. Available in all popular colors.