Hardin Marine

Dual Carbon Fiber Trim Switch Panel Only

Your Price:
$66.99

Dual Carbon Fiber Trim Switch Panel Only

724-1102 + Option(s)

  • 3" Wide x 3-1/2" Tall. 
  • Red, White, Translucent or Black, single or double pole Switches available separately. 
  • Panels available in Red, Blue, Purple, Black or Silver Carbon Fiber. 
  • REAL Carbon Fiber, not printed on.

Dual Carburetor Inline Linkage Kit
Your Price:
$59.99

Dual Carburetor Inline Linkage Kit

290-55-500

Dual Carburetor Inline Linkage Kit

This kit comes with bushings for Holley linkage heim joints, hex bar, bolts and nuts. Center to center is 12". Right hand thread can be trimmed to fit.


Dual Cooler Bellhousing Mount Ignition Box Mounting Bracket
Your Price:
$349.99

Dual Cooler Bellhousing Mount Ignition Box Mounting Bracket

755-3561

  • Ultimate in a clean and functional installation.
  • Designed for MSD 6M2L or New 6M3L Ignition Boxes
  • Will mount on a dual cooler bellhousing.
  • Will also mount round coils or MSD Blaster SS coils.
  • Satin Finish, paint, coat or polish to suit your build.

Dual Cooler Flywheel Housing Kit
Your Price:
$1,599.99

This Part has options, please click the button below to order.

Dual Cooler Flywheel Housing Kit

755-8053

Dual Cooler Flywheel Housing Kits - Dual Cooler Flywheel Housing (Bellhousing Only, No Cooler Kits)

This is just one more example of how Keith Eickert Performance Products has taken a proven design and once again improved it even further.  Here are a few of the key features that the Keith Eickert Dual Cooler Flywheel Housings offer.  The traditional water crossover feature that caused so many problems (factory style bellhousings) with delivering enough water to the opposite engine side coolers has been eliminated.  Torsional strengthening ribs have been added for unmatched strength and durability.  This is a common failure point in a factory style bellhousing on high horsepower applications.  Now the water is transferred through a 1-1/4" stainless transfer tube crossover system allowing complete unrestricted water flow to the oil cooler chambers. The improved water flow and cooling features don't stop there, the best part is the convenience of so many plumbing options from the top, bottom or back side for single or dual pass cooling options.  The flywheel housing is cast from 356-T6 aluminum and heat treated prior to CNC machining, next each unit is hardcoat anodized for maximum corrosion resistance. Kits include a dual cooler flywheel housing, oil cooler cover plates, cooler adapter nuts, and stainless steel hardware. Oil plumbing sold separately.

Note: This bellhousing fits Chevrolet engines only. To be used with the Top Mount Starter #620-10060

For Replacement Parts, Click here.


Dual Cooler Flywheel Housing Kit
Your Price:
$2,799.99

This Part has options, please click the button below to order.

Dual Cooler Flywheel Housing Kit

755-8054

Dual Cooler Flywheel Housing Kits - Dual Cooler Bellhousing with 13 Plate Port Cooler and 8 Plate Starboard Cooler

This is just one more example of how Keith Eickert Performance Products has taken a proven design and once again improved it even further.  Here are a few of the key features that the Keith Eickert Dual Cooler Flywheel Housings offer.  The traditional water crossover feature that caused so many problems (factory style bellhousings) with delivering enough water to the opposite engine side coolers has been eliminated.  Torsional strengthing ribs have been added for unmatched strength and durability.  This is a common failure point in a factory style bellhousing on high horsepower applications.  Now the water is transferred through a 1-1/4" stainless transfer tube crossover system allowing complete unrestricted water flow to the oil cooler chambers. The improved water flow and cooling features don't stop there, the best part is the convenience of so many plumbing options from the top, bottom or back side for single or dual pass cooling options.  The flywheel housing is cast from 356-T6 aluminum and heat treated prior to CNC machining, next each unit is hardcoat anodized for maximum corrosion resistance.  Kits include a dual cooler flywheel housing, high-flow multi-plate oil coolers, oil cooler cover plates, cooler adapter nuts, and stainless steel hardware.  Oil plumbing sold separately.

Note: To be used with the Top Mount Starter #620-10060


Dual Cooler Flywheel Housing Kit
Your Price:
$2,899.99

This Part has options, please click the button below to order.

Dual Cooler Flywheel Housing Kit

755-8057

Dual Cooler Flywheel Housing Kits - Dual Cooler Bellhousing with 15 Plate Port Cooler and 8 Plate Starboard Cooler

This is just one more example of how Keith Eickert Performance Products has taken a proven design and once again improved it even further.  Here are a few of the key features that the Keith Eickert Dual Cooler Flywheel Housings offer.  The traditional water crossover feature that caused so many problems (factory style bellhousings) with delivering enough water to the opposite engine side coolers has been eliminated.  Torsional strengthing ribs have been added for unmatched strength and durability.  This is a common failure point in a factory style bellhousing on high horsepower applications.  Now the water is transferred through a 1-1/4" stainless transfer tube crossover system allowing complete unrestricted water flow to the oil cooler chambers. The improved water flow and cooling features don't stop there, the best part is the convenience of so many plumbing options from the top, bottom or back side for single or dual pass cooling options.  The flywheel housing is cast from 356-T6 aluminum and heat treated prior to CNC machining, next each unit is hardcoat anodized for maximum corrosion resistance.  Kits include a dual cooler flywheel housing, high-flow multi-plate oil coolers, oil cooler cover plates, cooler adapter nuts, and stainless steel hardware.  Oil plumbing sold separately.

Note: To be used with the Top Mount Starter #620-10058


Dual Cooler Flywheel Housing Kit
Your Price:
$2,999.99

This Part has options, please click the button below to order.

Dual Cooler Flywheel Housing Kit

755-8059

Dual Cooler Flywheel Housing Kits - Dual Cooler Bellhousing with Dual 13 Plate Coolers

This is just one more example of how Keith Eickert Performance Products has taken a proven design and once again improved it even further.  Here are a few of the key features that the Keith Eickert Dual Cooler Flywheel Housings offer.  The traditional water crossover feature that caused so many problems (factory style bellhousings) with delivering enough water to the opposite engine side coolers has been eliminated.  Torsional strengthing ribs have been added for unmatched strength and durability.  This is a common failure point in a factory style bellhousing on high horsepower applications.  Now the water is transferred through a 1-1/4" stainless transfer tube crossover system allowing complete unrestricted water flow to the oil cooler chambers. The improved water flow and cooling features don't stop there, the best part is the convenience of so many plumbing options from the top, bottom or back side for single or dual pass cooling options.  The flywheel housing is cast from 356-T6 aluminum and heat treated prior to CNC machining, next each unit is hardcoat anodized for maximum corrosion resistance.  Kits include a dual cooler flywheel housing, high-flow multi-plate oil coolers, oil cooler cover plates, cooler adapter nuts, and stainless steel hardware.  Oil plumbing sold separately.

Note: To be used with the Top Mount Starter #620-10058


Dual Cooler Flywheel Housing Kit
Your Price:
$2,799.99

This Part has options, please click the button below to order.

Dual Cooler Flywheel Housing Kit

755-8060

Dual Cooler Flywheel Housing Kits - Dual Cooler Bellhousing with Dual 8 Plate Coolers

This is just one more example of how Keith Eickert Performance Products has taken a proven design and once again improved it even further.  Here are a few of the key features that the Keith Eickert Dual Cooler Flywheel Housings offer.  The traditional water crossover feature that caused so many problems (factory style bellhousings) with delivering enough water to the opposite engine side coolers has been eliminated.  Torsional strengthing ribs have been added for unmatched strength and durability.  This is a common failure point in a factory style bellhousing on high horsepower applications.  Now the water is transferred through a 1-1/4" stainless transfer tube crossover system allowing complete unrestricted water flow to the oil cooler chambers. The improved water flow and cooling features don't stop there, the best part is the convenience of so many plumbing options from the top, bottom or back side for single or dual pass cooling options.  The flywheel housing is cast from 356-T6 aluminum and heat treated prior to CNC machining, next each unit is hardcoat anodized for maximum corrosion resistance.  Kits include a dual cooler flywheel housing, high-flow multi-plate oil coolers, oil cooler cover plates, cooler adapter nuts, and stainless steel hardware.  Oil plumbing sold separately.

Note: To be used with the Top Mount Starter #620-10060


Dual Cylinder Power Assist Helm Unit
Your Price:
$399.99

Dual Cylinder Power Assist Helm Unit

137-9146

Dual Cylinder Power Assist Helm Unit

  • 120cc
  • FLOW RATE 1 1/2 TO 3 1/2 GPM
  • MAX PRESSURE 2500 PSI
  • OPEN CENTER NON LOAD REACTION
  • 3/4" O-RING PORTS

Dual Cylinder Steering Hose Kit
Your Price:
$319.99

Dual Cylinder Steering Hose Kit

137-9267

Dual Cylinder Steering Hose Kit

  • Two 22" Inside Hoses
  • Two 63" Inside Hoses
  • Two 1/4 NPTX-6 JIC Tee Fittings
  • Two 1/4 NPTX-6 JIC 90 Degree Fittings

Dual Groove Sea Pump Pulley for use with Crossover Power Steering Systems
Your Price:
$199.99

Dual Groove Sea Pump Pulley for use with Crossover Power Steering Systems

625-4256

Dual Groove Sea Pump Pulley for use with Crossover Power Steering Systems

Dual Inlet Standard Crossover
Your Price:
$289.99

Dual Inlet Standard Crossover

625-4380

  • CNC machined from 6061-T6 billet aluminum
  • These units fit all popular B/B GM type engines.
  • Inlet hose barb fittings are available separately.
  • Dual side entry 1" NPT inlets.
  • O-ringed on all sealing surfaces (eliminated the need for sealing gaskets).
  • Polished to a mirror finish or can be custom color finished by the customer.
  • Inlet hose barb fitting sold separately. 

Dual Inlet Standard Crossover With Power Steering Mount
Your Price:
$349.99

Dual Inlet Standard Crossover With Power Steering Mount

625-4382

  • CNC machined from 6061-T6 billet aluminum.
  • Eliminates the need for any additional power steering brackets.
  • These units fit all popular B/B GM type engines.
  • Features power steering mounting ears to be used in conjunction with the Hardin Marine crossover mounted power steering pump.
  • Inlet hose barb fittings are available separately.
  • Dual 1" NPT inlets.
  • Includes mounting bolts.
  • O-ringed on all sealing surfaces (eliminated the need for sealing gaskets).
  • Polished to a mirror finish or can be custom color finished by the customer.

1-1/4" Common Inlet Blocks - Dual Stage Inlet for 3 Stage Rear Entry Sea Pump
Your Price:
$159.99

Dual Stage Inlet for 3 Stage Rear Entry Sea Pump

625-4158

1-1/4" Common Inlet Blocks - Dual Stage Inlet for use 3 Stage Rear Entry Sea Pumps


Dual Stage Sea Pump Factory Rebuild
Your Price:
$419.99

Dual Stage Sea Pump Factory Rebuild

625-4191

Dual Stage Sea Pump Factory Rebuild

This is a factory rebuild of your pump. You will need to send your pump in to rebuilt. We will contact you with details when ordered.

Dual Stage Shaft for Gen 5/6 Multi Stage Sea Pump
Your Price:
$269.99

Dual Stage Shaft for Gen 5/6 Multi Stage Sea Pump

625-4090

Dual Stage Shaft for Hardin Marine Gen 5/6 Multi Stage Sea Pumps


Dual Stage Shaft for Multi Stage Sea Pump
Your Price:
$199.99

Dual Stage Shaft for Multi Stage Sea Pump

625-4070

Dual Stage Shaft for Hardin Marine Multi Stage Sea Pumps


Dual Trim Switch Bracket For Isotta Carlotta Steering Wheel
Your Price:
$100.00

Dual Trim Switch Bracket For Isotta Carlotta Steering Wheel

137-8604

Dual Trim Switch Bracket For Isotta Carlotta Steering Wheel

This bracket will mount to an Isotta Carlotta steering wheel and allow the attachment of two Bluetooth Trim Switch.


Dual Trim Switch Bracket For Most 6-Bolt Momo Pattern Steering Wheels
Your Price:
$79.99

Dual Trim Switch Bracket For Most 6-Bolt Momo Pattern Steering Wheels

137-8607

Dual Trim Switch Bracket For Most 6-Bolt Momo Pattern Steering Wheels

This bracket will mount to most 6-Bolt Momo pattern Steering Wheels and allow the attachment of two Bluetooth Trim Switches. Bracket position is adjustable, and can be flipped one way or the other for best fit. Works best on steering wheels with equidistant spokes.


Dual Trim Switch Panel



Your Price:
$79.99

This Part has options, please click the button below to order.

Dual Trim Switch Panel

137-8258 + Option(s)

  • Panel is Powdercoated Billet Aluminum
  • Two Rocker Switches Mom On / Off / Mom On
  • Measures 3" Wide x 3" Tall, Depth is 1/4"

Computer Re-Calibration & Monitoring (ECU) - Non Supercharged Engine
Your Price:
$1,750.00

ECM 555 Computer Re-Calibration & Monitoring (ECU) - 496 Mag and HO Supercharged Engine

620-75310

ECM 555 Computer Re-Calibration & Monitoring (ECU) - 496 Mag and HO Supercharged Engines

Have you modified your stock Mercury EFI engine by adding high performance exhaust, a bigger cam, a high flow flame arrestor, oradded a supercharger?

Hardin Marine can recalibrate your Mercury ECU (computer) to yield the very most of your engines power The ECU precisely controls fuel requirements, detonation control, idle speed and RPM limitations We have dyno-tested multiple combinations and know what works! Call us with your application requirements and we will lead you to maximum horsepower from you EFI engine. Allow approximately 4-7 days turn around time.

***Results will vary depending on boat design, propping, atmospheric conditions, environment and drivers. We cannot guarantee speed or plane time increases with the many different applications. MPH and power increase % are helpful rules of thumbs and are in no way guaranteed.


Computer Re-Calibration & Monitoring (ECU) - Non Supercharged Engine
Your Price:
$950.00

ECM 555 Computer Re-Calibration & Monitoring (ECU) - 496 Mag and HO, 525 Non Supercharged Engine

620-75309

ECM 555 Computer Re-Calibration & Monitoring (ECU) - 496 Mag and HO, 525 Non Supercharged Engines

Have you modified your stock Mercury EFI engine by adding high performance exhaust, a bigger cam, a high flow flame arrestor, oradded a supercharger?

Hardin Marine can recalibrate your Mercury ECU (computer) to yield the very most of your engines power The ECU precisely controls fuel requirements, detonation control, idle speed and RPM limitations We have dyno-tested multiple combinations and know what works! Call us with your application requirements and we will lead you to maximum horsepower from you EFI engine. Allow approximately 4-7 days turn around time.

***Results will vary depending on boat design, propping, atmospheric conditions, environment and drivers. We cannot guarantee speed or plane time increases with the many different applications. MPH and power increase % are helpful rules of thumbs and are in no way guaranteed.


End Cap Bolt Kit (per manifold) For 455 Olds Square Exhaust Manifold
Your Price:
$6.99

End Cap Bolt Kit (per manifold) For 455 Olds Square Exhaust Manifold

620-45511

End Cap Bolt Kit (per manifold) For 455 Olds Square Exhaust Manifold


Billet Aluminum Head Mount Lifting Ring
Your Price:
$79.99

Engine Lifting Eye Stainless Steel - Intake Manifold Mount

755-8908

Engine Lifting Eye Stainless Steel - Intake Manifold Mount

Description Engine lifting ring heavy-duty (mounts on cylinder head) custom designed bolts on to most BBC cylinder head and intake manifolds. Easy to install, and manufactured from 1/4 inch thick fully polished 316 stainless steel. These lifting eyes will handle a fully dressed Chevy SBC and BBC V-8.


Engine Mount Terminal Block Assembly
Your Price:
$49.99

Engine Mount Terminal Block Assembly

620-08806

Engine Mount Terminal Block Assembly

This is the popular terminal block and bracket used with our exclusive engine harness. This is the perfect starting point for those of you do-it-yourself wire specialists. NOTE: Bracket is universal fit and may require bushings or washers on one side of the bracket when mounting (not included).

30 Amp breakers on the button circuit breaker


Exhaust Header Spacer Kit for 8.2L Engines with D Shaped Cylinders
Your Price:
$519.99

Exhaust Header Spacer Kit for 8.2L Engines with D Shaped Cylinders

620-38194

Exhaust Header Spacer Kits for 8.2L Engines with D Shaped Cylinders Non-Coated Stainless Steel

These spacers are the answer for aftermarket Hardin Marine, CMI or other brand headers and manifolds with 3/8" flanges mounting flanges. These spacers allow for a proper gasket seal when mounting your new aftermarket exhaust headers. Spacers are 3/8" thick. Made from stainless steel. Sold in pairs. Includes two gaskets for the cylinder head side and longer bolts for headers with 3/8" flanges. If you are using manifolds or headers with thicker flanges you will need to source other bolts.

For manifolds on these applications:

  • 8.2L Mag EC (H.O. Model) 2A041665 THRU 2A051740)
  • 8.2L Mag EC (H.O. Model) (2A051742 & Up)
  • 8.2L INBOARO (H.O.) EC - [2A041665 & UP.)
  • 8.2L Mag EC (Base Model) - [ 2A051743 & UP)
  • 8.2L MPI Bravo - [1G400000 THRU 1G499999]
  • 8.2L Mag (H.O. Model ) - [ 1A351597 & UP]
  • 8.2L MP) Bravo - [1G400000 THRU 1G499999]
  • 8.2L INBOARD (Base) EC - [2A041665 & UP]
  • 8.2L Mag /Base Model) - [1A351597 & UP]
  • 8.2L Mag EC (Base Model) - 2A041665 THRU 2A051741)

Exhaust Manifold Adapter - 460 Ford To Big Block Chevy Manifold
Your Price:
$469.99

Exhaust Manifold Adapter - 460 Ford To Big Block Chevy Manifold

125-460454

Exhaust Manifold Adapter - 460 Ford To Big Block Chevy Manifold

Hardin Marine came up with adapters so you can use Big Block Chevy exhaust manifolds on a 460 Ford engine giving you a broader selection of exhaust systems to choose from. These adapters are made from 6061-T6 billet aluminum. Sold in pairs.

NOTE:  These manifold spacers are only recommended for use with CAST ALUMINUM EXHAUST MANIFOLDS.