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Oil Cooler - 2" Diameter, 8" Length, 1" NPT Connection

Oil Cooler - 2" Diameter, 8" Length, 1" NPT Connection

Oil Cooler - 2" Diameter, 8" Length, 1" NPT Connection

This cooler features thirty-one 1/4" cooling tubes with displacement baffles. It also has 3/8" NPT oil connections with an 1/8" NPT drain. Operating pressure of up to 150 PSI. Designed for power steering or transmission applications.

Your Price: $99.99 
Part Number: 620-150

Oil Cooler - 2

Oil Cooler - 2" Diameter, 8" Length, 3/4" NPT Connection

Oil Cooler - 2" Diameter, 8" Length, 3/4" NPT Connection

This cooler features thirty-one 1/4" cooling tubes with displacementbaffles.  It also has 3/8" NPT oil connections with an 1/8" NPTdrain.  Operating pressure of up to 150 PSI.  Designed for powersteering or transmission applications.

Your Price: $99.99 
Part Number: 620-125

Oil Cooler - 2" Diameter, 8" Length, 1-1/4" Hose Connection

Oil Cooler - 2" Diameter, 9" Overall Length, 1-1/4" Hose Connection

Oil Cooler - 2" Diameter, 9" Overall Length, 1-1/4" Hose Connection

This cooler features thirty-one 1/4" cooling tubes with displacement baffles. It also has 3/8" NPT oil connections with an 1/8" NPT drain. Operating pressure of up to 150 PSI. Designed for power steering or transmission applications.

Your Price: $86.99 
Part Number: 620-100

Replacement Oil Cooler Thermostat 190-210 Degree

Replacement Oil Cooler Thermostat 190-210 Degree

Replacement Oil Cooler Thermostat 190-210 Degree

This is a replacement thermostat for use in Hardin Marine Tube Style Oil Coolers.
Your Price: $79.99 
Part Number: 620-701

Tube Style Engine Oil Control Kit Up To 700HP

Tube Style Engine & Power Steering Oil Control Kit Up To 700HP

  • For Gen 5/6 BBC Applications.
  • 3" x 25" Oil & Power SteeringCooler with Polished Brackets.
  • 6' of Push-Loc Hose included.
  • Includes 625-7704 Thermostatically Controlled Engine Block Adapter.
  • Includes 6 Straight and 6 90 Degree Fittings for installation.
  • For Gen 4 BBC Applications, Part Number 625-7918 must be ordered as well.
Your Price: $1,039.99 
Part Number: 620-850

Tube Style Engine Oil Control Kit Up To 700HP

Tube Style Engine Oil Control Kit Up To 1000HP

  • For Gen 5/6 BBC Applications.
  • 3" x 24" Oil Cooler with Polished Brackets.
  • 6' of Push-Loc Hose included.
  • Includes 625-7704 Thermostatically Controlled Engine Block Adapter.
  • Includes 6 Straight and 6 90 Degree Fittings for installation.
  • For Gen 4 BBC Applications, Part Number 625-7918 must be ordered as well.
Your Price: $1,029.99 
Part Number: 620-825

Tube Style Engine Oil Control Kit Up To 700HP

Tube Style Engine Oil Control Kit Up To 700HP

  • For Gen 5/6 BBC Applications.
  • 3" x 16" Oil Cooler with Polished Brackets.
  • 6' of Push-Loc Hose included.
  • Includes 625-7704 Thermostatically Controlled Engine Block Adapter.
  • Includes 6 Straight and 6 90 Degree Fittings for installation.
  • For Gen 4 BBC Applications, Part Number 625-7918 must be ordered as well.
Your Price: $995.99 
Part Number: 620-800

Oil Cooler - 2" Diameter, 16" Length, 1" NPT Connection

Oil Cooler - 2" Diameter, 16" Overall Length, 1" NPT Connection

Oil Cooler - 2" Diameter, 16" Overall Length, 1" NPT Connection

Featuring thirty-one 1/4" cooling tubes with displacement baffles! Large 3/4" NPT oil connections for increased flow with an 1/8" NPT drain. Rated operating pressure up to 150 PSI. Recommended for engines up to 425 horsepower.

Your Price: $119.99 
Part Number: 620-350

Oil Cooler - 2" Diameter, 16" Length, 1-1/4" Hose Connection

Oil Cooler - 2" Diameter, 16" Overall Length, 1-1/4"Hose Connection

Oil Cooler - 2" Diameter, 16" Overall Length, 1-1/4" Hose Connection

Featuring thirty-one 1/4" cooling tubes with displacement baffles! Large 3/4" NPT oil connections for increased flow with an 1/8" NPT drain. Rated operating pressure up to 150 PSI. Recommended for engines up to 425 horsepower.

Your Price: $109.99 
Part Number: 620-300

Oil Cooler - 2" Diameter, 16" Length, 3/4" NPT Connection

Oil Cooler - 2" Diameter, 16" Overall Length, 3/4" NPT Connection

Oil Cooler - 2" Diameter, 16 Overall Length, 3/4" NPT Connection

Featuring thirty-one 1/4" cooling tubes with displacement baffles! Large 3/4" NPT oil connections for increased flow with an 1/8" NPT drain. Rated operating pressure up to 150 PSI. Recommended for engines up to 425 horsepower.

Your Price: $119.99 
Part Number: 620-325

Combination Engine Oil & Power Steering Or Transmission Cooler

Combination Engine Oil & Power Steering Or Transmission Cooler

Combination Engine Oil & Power Steering Or Transmission Cooler, 2" Diameter, 19" Overall Length, 3/8" NPT P/S and 3/4" NPT Oil Connections, 1-1/4" Water Connection

All the same features as our other coolers except it is designed as a MerCruiser replacement cooler for the most common V8 engines. The only noticeable difference is the use of 3/4" NPT oil connections providing a higher volume flow capacity.

Note: Never use small than a 3/4" NPT oil connection on engine coolers.

Your Price: $229.99 
Part Number: 620-400

Combination Engine Oil & Power Steering Or Transmission Cooler

Combination Engine Oil & Power Steering Or Transmission Cooler

Combination Engine Oil & Power Steering Or Transmission Cooler, 2" Diameter, 18" Length, 3/8" NPT P/S and 3/4" NPT Oil Connections, 1" NPT Water Connection

All the same features as our other coolers except it is designed as aMerCruiser replacement cooler for the most common V8 engines.  The onlynoticeable difference is the use of 3/4" NPT oil connections providing ahigher volume flow capacity.

Note:  Never use small than a 3/4" NPT oil connection on enginecoolers.

Your Price: $229.99 
Part Number: 620-450

Hi-Performance Combination Power Steering & Engine Oil Cooler, 3

Hi-Performance Combination Power Steering & Engine Oil Cooler

Hi-Performance Combination Power Steering & Engine Oil Cooler, 3" Diameter, 23" Overall Length, 3/4" NPT Oil Connections, 3/8" NPT Power Steering Connections, 1" NPT Water Connection

Have you made some performance modifications and you're now making mega horsepower only to find out your stock Mercury cooler can't keep up? Well not only is this our most popular combination cooler, it is also the answer to getting those oil temperatures back down where they belong. This cooler features seventy-six 1/4" seamless cooling tubes and can handle form 450 to 750 horsepower applications with ease. With a 23" overall length, 3/4" NPT oil connections, 3/8" NPT P/S connections, and 1" water connections, this is the perfect solution.

Your Price: $409.99 
Part Number: 620-650

Hi-Performance Engine Oil Cooler

Hi-Performance Engine Oil Cooler

Hi-Performance Engine Oil Cooler, 3" Diameter, 16" Overall Length, 3/4" NPT Oil Connections, 1" NPT Water Connection

Designed for engines making 450 horsepower and above.  These units have seventy-six 1/4" seamless tubes - over double that of a 2" cooler.  The cooler incorporates cast end caps, NO cheap press-formed caps are used.  Operating pressure up to 150 PSI.  This is the cooler all others try to imitate but can never duplicate.  Compare features and you will demand Hardin Marine oil coolers.

Your Price: $249.99 
Part Number: 620-550

Hi-Performance Engine Oil Cooler

Hi-Performance Engine Oil Cooler

H/P Oil Cooler, 3/4" NPT Oil connections, 1" NPT Water Connections, 3" Diameter x 21" Overall Length.

High performance 3" diameter oil coolers (above) are designed for engines making 450 HP and up. These units have seventy-six 1/4" seamless tubes and operate at 150 psi.

Your Price: $409.99 
Part Number: 620-555

Big Block Chevy Gen 4 Bolt-On Cooler, 5

Big Block Chevy Gen 4 Bolt-On Cooler, 5" X 14-3/4" Length

Big Block Chevy Gen 4 Bolt-On Cooler, 5" X 14-3/4" Length

This Olsen hi-performance engine oil cooler has a unique feature - it bolts directly to the engine block and requires no additional oil plumbing It merely sandwiches between the oil filter pad and oil filter It is available in either 1-1/4" push-on fittings or AN style fittings to plumb the water inlet and exit This cooler uses a large well designed 3" core and is available hard anodized or polished as an option An offshore model is available to clear mid-engine motor mounts This cooler completely disassembles for servicing.

Your Price: $529.99 
Part Number: 260-OC401

Big Block Chevy Gen 4 Bolt-On Cooler, 5

Big Block Chevy Gen 4 Bolt-On Cooler, 5" X 19-3/4" Length

Big Block Chevy Gen 4 Bolt-On Cooler, 5" X 19-3/4" Length

This Olsen hi-performance engine oil cooler has a unique feature - it bolts directly to the engine block and requires no additional oil plumbing It merely sandwiches between the oil filter pad and oil filter It is available in either 1-1/4" push-on fittings or AN style fittings to plumb the water inlet and exit This cooler uses a large well designed 3" core and is available hard anodized or polished as an option An offshore model is available to clear mid-engine motor mounts This cooler completely disassembles for servicing.

Your Price: $529.99 
Part Number: 260-OC201

Big Block Chevy Gen 5 Bolt-On Cooler, 5

Big Block Chevy Gen 5 Bolt-On Cooler, 5" X 19-3/4" Length

Big Block Chevy Gen 5 Bolt-On Cooler, 5" X 19-3/4" Length

This Olsen hi-performance engine oil cooler has a unique feature - it bolts directly to the engine block and requires no additional oil plumbing It merely sandwiches between the oil filter pad and oil filter It is available in either 1-1/4" push-on fittings or AN style fittings to plumb the water inlet and exit This cooler uses a large well designed 3" core and is available hard anodized or polished as an option An offshore model is available to clear mid-engine motor mounts This cooler completely disassembles for servicing.

Your Price: $529.99 
Part Number: 260-OC202

Big Block Chevy Gen 5 Offshore Cooler,  5

Big Block Chevy Gen 5 Offshore Cooler, 5" x 14 3/4" Length

Big Block Chevy Gen 5 Offshore Cooler, 5" x 14 3/4" Length

This Olsen hi-performance engine oil cooler has a unique feature - it bolts directly to the engine block and requires no additional oil plumbing. It merely sandwiches between the oil filter pad and oil filter. It is available in either 1-1/4" push-on fittings or AN style fittings to plumb the water inlet and exit. This cooler uses a large well designed 3" core

Your Price: $529.99 
Part Number: 260-OC402

Stringer Mount Remote Cooler, 5

Stringer Mount Remote Cooler, 5" X 14-3/4" Length

Stringer Mount Remote Cooler, 5" X 14-3/4" Length

Available in either 1-1/4" push-on fittings or AN style fittings to plumb the water inlet and exit This cooler uses a large well designed 3" core and is available hard anodized or polished as an option An offshore model is available to clear mid-engine motor mounts This cooler completely disassembles for servicing.

Your Price: $529.99 
Part Number: 260-OC102

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