Hardin Marine

3 Stage Stainless Steel  Sea Pump with 1 Groove Pulley, Single 1-1/4” NPT Front Inlet & Single 1” NPT / 1-1/4 NPT Rear Exit Common
Your Price:
$1,529.99

3 Stage Stainless Steel Sea Pump with 1 Groove Pulley, Single 1-1/4" NPT Front Inlet & Single 1" NPT / 1-1/4 NPT Rear Exit Common

625-4983

3 Stage Stainless Steel Sea Pump with 1 Groove Pulley, Single 1-1/4” NPT Front Inlet & Single 1” NPT / 1-1/4 NPT Rear Exit Common

Our 3 stage Extreme sea pump is unsurpassed in the marine industry and is the number one choice of the most recognized engine builders and offshore racers in the world today!

Designed to incorporate the same features and the single and dual stage pumps, the addition of one more impeller allows for maximum water flow to be passed through the engine while the third impeller is dedicated to cooling the intercooler only. Dyno testing has shown that dedicating an individual water flow thru the intercooler does indeed increase horsepower. The triple stage Extreme pump allows you to accomplish this without sacrificing valuable cooling water in the engine itself. This pump is custom configured to your individual needs.


3 Stage Stainless Steel Sea Pump with 2 Groove Pulley, Single 1-1/4” NPT Front Inlet & 3 Single 1”NPT Outlets
Your Price:
$1,479.99

3 Stage Stainless Steel Sea Pump with 2 Groove Pulley, Single 1-1/4" NPT Front Inlet & 3 Single 1" NPT Outlets

625-4991

3 Stage Stainless Steel Sea Pump with 2 Groove Pulley, Single 1-1/4” NPT Front Inlet & 3 Single 1”NPT Outlets

Our 3 stage Extreme sea pump is unsurpassed in the marine industry and is the number one choice of the most recognized engine builders and offshore racers in the world today!

Designed to incorporate the same features and the single and dual stage pumps, the addition of one more impeller allows for maximum water flow to be passed through the engine while the third impeller is dedicated to cooling the intercooler only. Dyno testing has shown that dedicating an individual water flow thru the intercooler does indeed increase horsepower. The triple stage Extreme pump allows you to accomplish this without sacrificing valuable cooling water in the engine itself. This pump is custom configured to your individual needs.


3 Stage Stainless Steel  Sea Pump with 2 Groove Pulley, Single 1-1/4” NPT Front Inlet & Single 1” NPT / 1-1/4 NPT Rear Exit Common
Your Price:
$1,552.99

3 Stage Stainless Steel Sea Pump with 2 Groove Pulley, Single 1-1/4" NPT Front Inlet & Single 1" NPT / 1-1/4 NPT Rear Exit Common

625-4993

3 Stage Stainless Steel Sea Pump with 2 Groove Pulley, Single 1-1/4” NPT Front Inlet & Single 1” NPT / 1-1/4 NPT Rear Exit Common

Our 3 stage Extreme sea pump is unsurpassed in the marine industry and is the number one choice of the most recognized engine builders and offshore racers in the world today!

Designed to incorporate the same features and the single and dual stage pumps, the addition of one more impeller allows for maximum water flow to be passed through the engine while the third impeller is dedicated to cooling the intercooler only. Dyno testing has shown that dedicating an individual water flow thru the intercooler does indeed increase horsepower. The triple stage Extreme pump allows you to accomplish this without sacrificing valuable cooling water in the engine itself. This pump is custom configured to your individual needs.


3" Angle Cut Exhaust Tip
Your Price:
$149.99

3" Angle Cut Exhaust Tip

410-281302

  • 3" Diameter.
  • Diameter of the mounting flange is 4 3/4"
  • Constructed of 316L Stainless Steel.
  • Tip includes internal flap.
  • Sold Each.
  • 45 Degree Angle Cut.
  • Use Silicone to seal to Transom.
  • Length 12-1/2", Flange to Inside End 5", Flange to Outside End 7-1/2".

3" Angle Cut Part-Time Transom Mounted Silencers
Your Price:
$559.99

3" Angle Cut Part-Time Transom Mounted Silencers

410-282301

3" Angle Cut Part-Time Transom Mounted Silencers

These silencers are 100% stainless steel and are perfect for both stock and slightly modified engines There are no moving parts and they come in a brilliant polished finish These silencers are called part-time because by simply removing one bolt per tip you can remove the slip-in silencers and have straight through exhaust Approximately an 8 to 10 decibel reduction is achieved with these silencers installed.

Available in your choice of straight or angle cut styles. All tips require a 4" mounting hole while providing the appropriate exhaust hose connection size.

Sold in pairs.


3" Black Billet O-Ring Clamp Oil Cooler Bracket
Your Price:
$52.99

3" Black Billet O-Ring Clamp Oil Cooler Bracket

620-204

3" Black Billet O-Ring Clamp Oil Cooler Bracket

Center-to-center mounting hole distance: dual 5/16 bolt 1-9/16 cl

The Hardin Marine bracket not only has a unique mounting feature, it also has an integrated O-ring cushion. It will not scratch or mar the cooler and it provides a non-slip clamping surface. Inferior brackets literally crush your cooler to hold it. Don't crush your cooler - clamp it correctly with Hardin Marine oil cooler clamps! Use counter sunk flat head 5/16" screws/bolts to mount (not included). The clamp is 3/4" wide. Sold Each.


3" Black Marine Bilge / Vent Hose
Your Price:
$0.99

3" Black Marine Bilge / Vent Hose

100-400-3000

3" I.D Black Bilge / Vent Hose

This hose is used to plumb from your bilge blower to your engine compartment.

Bilge / Vent hose is sold by the foot, i.e add quantity of 6 for 6 ft. of hose.

Hose comes in maximum of 50 feet sections. Please specify if you want sections cut into specific lengths when ordering over 50 feet.


3" I.D Marine Water Certified Corrugated Exhaust Hose
Your Price:
$2.99

3" I.D Marine Water Certified Corrugated Exhaust Hose

100-252-3004

3" I.D Marine Water Certified Corrugated Exhaust Hose

This hose allows you to make only very slight bends due to its corrugated design used in extreme-duty applications. It has a reinforcing wire threaded through the wall to increase strength.

All exhaust hose is sold by the inch, i.e add quantity of 24 for 24 in. (2 ft.) of hose.

Hose comes in 12.5 feet sections. Specify if you want sections cut when ordering over 12 feet.

3" Internal Butterfly Style Rubber Replacement Exhaust Flapper
Your Price:
$24.99

3" Internal Butterfly Style Rubber Replacement Exhaust Flapper

410-280171

3" Internal Butterfly Style Rubber Replacement Exhaust Flapper

These original equipment style rubber flaps are designed to replace missing or burned out flaps. They can also be easily retro-fitted to tips that were not originally equipped with flaps. This flap tack welds in place on a stainless steel tip.
Note: Flaps are recommended in all wet exhaust systems. Sold each.


3" Marine Grade Corrugated Exhaust Hose
Your Price:
$1.99

3" Marine Grade Hardwall Exhaust Hose

100-250-3004

3" I.D Marine Grade Hardwall Exhaust Hose

This hose allows you to make only very slight bends due to its hardwall design used in extreme-duty applications. It looks exactly like the softwall hose except it has a reinforcing wire threaded through the wall to increase strength.

All exhaust hose is sold by the inch, i.e add quantity of 24 for 24 in. (2 ft.) of hose.

Hose comes in 12.5 feet sections. Specify if you want sections cut when ordering over 12 feet.


3" Marine Grade Soft Wall Exhaust Hose
Your Price:
$1.99

3" Marine Grade Soft Wall Exhaust Hose

100-200-3004

3" I.D Marine Grade Soft Wall Exhaust Hose

This is top quality soft wall exhaust hose It's pliable construction makes it easier to work with than hard wall hose.

All exhaust hose is sold by the inch, i.e add quantity of 24 for 24 in. (2 ft.) of hose.

Hose comes in maximum of 12.5 feet sections. Please specify if you want sections cut into specific lengths when ordering over 12 feet.


3” Next Generation Silencer System (Trumpet Tip Replacement)
Your Price:
$434.99

3" Next Generation Silencer System (Trumpet Tip Replacement)

410-282304

  • 3" Hose Connection.
  • Extend 6-1/2” long from the transom mounting flange to the end of the tip.
  • Direct replacement for old style trumpet tips.
  • 3" of tube on the inside of the flange.
  • Each set comes complete with external flappers.
  • Sold in pairs.
  • 4.093" Bolt Circle

3" Polished Billet O-Ring Clamp Oil Cooler Bracket
Your Price:
$49.99

3" Polished Billet O-Ring Clamp Oil Cooler Bracket

620-203

3" Polished Billet O-Ring Clamp Oil Cooler Bracket

Center-to-center mounting hole distance: dual 5/16 bolt 1-9/16 cl

The Hardin Marine bracket not only has a unique mounting feature, it also has an integrated O-ring cushion. It will not scratch or mar the cooler and it provides a non-slip clamping surface. Inferior brackets literally crush your cooler to hold it. Don't crush your cooler - clamp it correctly with Hardin Marine oil cooler clamps! Use counter sunk flat head 5/16" screws/bolts to mount (not included). The clamp is 3/4" wide. Sold Each.


3/4" Marine Bilge Hose

Your Price:
$2.99

3" Pro-Flex Marine Bilge Hose

100-1300 + Option(s)

3" I.D Pro-Flex Marine Bilge Hose

This hose is designed to go from your bilge blower to your bilge vent. It is flexible and easy to route.

  • 3.5:1 RATIO FROM FULLY EXTENDED TO COLLAPSED
  • AVAILABLE IN CONTINOUS PIECES UP TO 50FT
  • RETAINS USER'S DESIRED SHAPE
  • SPACE SAVER AND FLEXIBILITY
  • LIGHTWEIGHT AND CRUSH PROOF
  • PUNCTURE RESISTANT ABRASION RESISTANT AND MINIMUM FLEX STRESS
  • PROPRIETARY POLYOLEFIN COPOLYMER FORMULATION BLENDING PROCESS THAT ENSURES PRODUCT CONSISTENCY
  • CUSTOM COLORS AVAILABLE SOON - CURRENTLY ONLY BLACK AVAILABLE
  • TEMP RANGE -40 TO 160 F
  • MADE IN USA

Water bilge hose is sold by the foot, i.e add quantity of 6 for 6 ft. of hose.


3" Standard Straight Cut Exhaust Tip
Your Price:
$179.99

3" Standard Straight Cut Exhaust Tip

410-281300

  • Constructed of 316L Stainless Steel.
  • 3" Diameter.
  • Diameter of the mounting flange is 4-3/4"
  • Extra Long with Internal Flapper.
  • Straight end cut.
  • These tips include internal flaps.
  • These tips will also accept external Salisbury flappers.
  • Sold Each.
  • Length 8", Flange to Inside end 5", Flange to Outside end 3".
  • Use Silicone to Seal to Transom.

3" Straight Cut Part-Time Transom Mounted Silencers
Your Price:
$540.00

3" Straight Cut Part-Time Transom Mounted Silencers

410-282300

3" Straight Cut Part-Time Transom Mounted Silencers

These silencers are 100% stainless steel and are perfect forboth stock and slightly modified engines There are no moving partsand they come in a brilliant polished finish These silencers arecalled part-time because by simply removing one bolt per tip youcan remove the slip-in silencers and have straight throughexhaust Approximately an 8 to 10 decibel reduction is achieved with these silencers installed.

Available in your choice of straight or angle cut styles. All tips require a 4" mounting hole while providing the appropriate exhaust hose connection size.

Sold in pairs.


3" To 4" 316L Stainless Steel Inline Exhaust Reducer
Your Price:
$58.99

3" To 4" 316L Stainless Steel Inline Exhaust Reducer

410-304

3" To 4" 316L Stainless Steel Inline Exhaust Reducer

These simple inline exhaust reducers join 2 different size exhaust hoses, tips or tubes together. They are universal in design and measure 4" in length.

Sold each.


3" White Marine Bilge / Vent Hose
Your Price:
$0.99

3" White Marine Bilge / Vent Hose

100-400-3001

3" I.D White Bilge / Vent Hose

This hose is used to plumb from your bilge blower to your engine compartment.

Bilge / Vent hose is sold by the foot, i.e add quantity of 6 for 6 ft. of hose.

Hose comes in maximum of 50 feet sections. Please specify if you want sections cut into specific lengths when ordering over 50 feet.


Pulley for Crossover Mount Power Steering Pump
Your Price:
$89.99

3.5" Pulley for Power Steering Pump with Splined Shaft

135-20008

3.5" Pulley for Power Steering Pump with Splined Shaft

Fits KRC Power Steering Pumps with Splined Shaft


3/4" Hose 180 Degree U-Bend Fitting
Your Price:
$8.99

3/4" Hose 180 Degree U-Bend Fitting

420-470945

  • Chromed Brass
  • 3/4" Hose Barbs
  • Was originally used on SBC Gil Exhaust
  • Use anywhere a tight turn is needed on a 3/4" hose line

3/4" Left Hand Male Rod End
Your Price:
$86.99

3/4" Left Hand Male Rod End

135-3434L

3/4" Left Hand Male Rod End

These rod ends are all stainless steel


3/4" Marine Bilge Hose
Your Price:
$1.20

3/4" Marine Bilge Hose

100-120-0346

3/4" I.D Bilge Hose

This hose is designed to go from your bilge pump to your water dump It is flexible and easy to route.

Water bilge hose is sold by the foot, i.e add quantity of 6 for 6 ft. of hose.

Hose comes in maximum of 50 feet sections. Please specify if you want sections cut into specific lengths when ordering over 50 feet.


3/4" Marine Hard Water Hose
Your Price:
$8.99

3/4" Marine Hard Wall Water Hose

100-100-0344

Marine Hard Wall Water Hose 3/4" I.D.

This hard wall water hose is used in many marine applications and is designed to last in harsh environments.

Water hose is sold by the foot, i.e add quantity of 6 for 6 ft. of hose.


3/4" Marine Vent / Bilge Hose
Your Price:
$1.99

3/4" Marine Vent / Bilge Hose

100-150-0340

3/4" I.D Vent / Bilge Hose

This hose is commonly used for venting or bilge dump.

Vent / Bilge hose is sold by the foot, i.e add quantity of 6 for 6 ft. of hose.

Hose comes in maximum of 50 feet sections. Please specify if you want sections cut into specific lengths when ordering over 50 feet.


3/4" NPT Composite Pipe Plug
Your Price:
$3.99

3/4" NPT Composite Pipe Plug

540-224000

3/4" NPT Composite Pipe Plug

3/4" NPT Composite Pipe Plug - Hex Head
Your Price:
$4.99

3/4" NPT Composite Pipe Plug - Hex Head

540-224015

3/4" NPT Composite Pipe Plug - Hex Head

3/4" NPT Cooler Nut
Your Price:
$24.95

3/4" NPT Cooler Nut

625-8075

3/4" NPT Cooler Nut

At last an answer to the restriction problem commonly caused by pipe thread style fittings with a plate style cooler. Sold Each.