Hardin Marine

LS1, LS2, LS3 and LS6 Closed Cooling Kit - Copper / Brass

While there are numerous universal OEM closed cooling kits, this is not one of those. This is a true custom engineered and developed closed cooling system designed around new LS1, LS2, LS3 and LS6 applications. The kit is perfect for engines making up to 650 horsepower.

We offer the closed cooling tank version with a pre-primed coat, where you can paint-to-finish. This allows you to customize it to your engine for the ultimate in appearance and durability. This High Performance Closed Cooling kit is designed for applications with horsepower levels to 650HP.

The Kit comes with: Tank, Brackets, Hoses.

NOTE: Will not work with port side mounted sea pumps 625-4116, 625-4117.

These will NOT work with IMCO, MP, or front inlet exhaust systems.
These WILL work with Seaward, Hardin Cyclone, Lightning and CMI exhaust systems

LSA / LSX PTO 1310 Adapter Bolt Kit

Contains (8) M11x1.5x31 Bolts and (4) 3/8"-24 x 1" bolts

LSA / LSX PTO 1350 Adapter Bolt Kit

Contains (8) M11x1.5x31 Bolts and (4) 7/16"-20 x 1" bolts

Machine Polished Crosswind 455 Olds Intake Manifold

This is the only high performance high rise dual plane manifold available for this engine. It features a number of unique enhancements. The CROSSWIND design which provides an air gap under the plenum helps cool the intake charge for maximum power production. It features a square bore carburetor pad which is an inch and a quarter taller than competitive dual plane manifolds which further enhances the power producing capabilities. The manifold can be drilled and tapped for nitrous nozzles and is also available in versions with machined injector bosses. This is machined polished finish, it is NOT a mirror polish finish, see picture!

Magnaflow Front Cover O-Ring

• Same high output assem­bly that is currently found in all MSD Distributor. 
• Supplied with the two pin connector installed

Magnum Choice Replacement Polished Tailpipe - Big Block Bravo

The Magnum Choice Tailpipe was designed for use in boats with a selectable exhaust diverter system.  These pipes are sold in pairs.p>

Additional Information:

• Standard Alpha/Bravo Exhaust Hole Locations

Magnum Choice Replacement Polished Tailpipe - Custom

The Magnum Choice Tailpipe was designed for use in boats with a selectable exhaust diverter system. These pipes are sold in pairs.

Additional Information:

• Standard Alpha/Bravo Exhaust Hole Locations

Priced according to your dimensions.  Submit your custom measurements for a price quote.

Replacement Main Body O-Ring for Hardin Marine Multi Stage Sea Pumps - Gen I

Main Bracket for Hardin Marine Multi Stage Sea Pumps

Mando 65 Amp Marine Alternator

• Replaces: Mercruiser # 805884T & 805447T
• Replaces Sierra 18-5965 and Arco 60065
• Red Wire is for Sensor
• Purple Wire is for Excitation
• Replacement Voltage Regulator # VR54
• V-Groove Pulley

Mando Alternator Pulley

Hardin Marine has the correct billet alternator pulley for your Mando alternator. Just slide yours off and replace it with Hardin polished billet pulley.

Mando Style Alternator - 12 Volt, 65 Amp, Single Pulley

This marine alternator is Coast Guard approved and replaces your Delco type (reference No.3856600). These feature non-corrosive elements for longer lasting life. Internal fan. Single V-Groove Pulley. Replaces Pleasurecraft RA097007B, Delco 19020608, Sierra# 18-6288, Arco# 20825 . Internally regulated.

**This alternator requires a plug item #620-3149MW**

Small Frame New Mando Alternator - 12 Volt, 55Amp for Mercruiser, VolvoPenta, Universal Atomic 4 as well as others. Internal Regulator, Negative Ground, Complete With Screens. USCG Approved and features non-corrosive elements.

• 55 Amp Replaces
  Motorola nos.78403A2, 8MR2023F & 8MR2024F
  Mando # AC 155603
  Mercruiser #'s 12449, 817119A1, 817119A4 & 92497A3
  OMC #'s 3854182, 3853853, 3854809, 987774, 985465, 986008 & 988247
  Volvo #'s 3854809-5, 3854182-7, 3853853-4 & 3850927-9
  GM nos.78477 & 9793
  Crusader 39200
  Marine Power 1210-000
• Red Wire is for Sensor
• Purple Wire is for Excitation
• Replacement Voltage Regulator # VR54

Mandrel For Sea Pump Pulley

• For Log Manifolds 
• 5" Outside Diameter 
• 3" Inside Diameter 
• 2-15/16" Bolt Hole to Bolt Hole (Adjacent)
• 4-1/8" Bolt Hole to Bolt Hole (Across)
• Sold Each

• Fits Hardin, Hardin Marine, Power Torque and Mercury Hi-Performance
• Replace your worn out hoses, or have a spare on hand!
• 1" Inside Diameter
• 6-1/2" Center to Center

Marine Oil Pan Pick-up - Big Block Chevy Standard Jet Drive Gen 4, 5 & 6

High performance oil pickups to fit most popular applications. For use primarily on Hardin Marine Jet Drive (Gold) Oil Pans.

Marine Oil Pan Pick-up - Ford Jet Pan Pick-up for truck style oil pump

High performance oil pickups to fit most popular applications. For use primarily on Hardin Marine Jet Drive (Gold) Oil Pans.

Marine Oil Pan Pick-up - Olds Jet Pan

High performance oil pickups to fit most popular applications.

Marine Seal™ Water Pump Cover Gasket - Oldsmobile 350/455- Sold Each

These Hardin Marine Seal timing cover/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

Clockwise Rotation

Fits 6 & 8 cylinder engines with 14-1/4" flywheel and offset bolt pattern.

Clockwise Rotation

Fits 4, 6 & 8 cylinder engines with 12-3/4" flywheel bottom mount and straight bolt pattern.

Counter Clockwise Rotation

Fits 4, 6 & 8 cylinder engines with 12-3/4" flywheel bottom mount and straight bolt pattern.

Clockwise Rotation

For 455 Olds Marine V8 High Performance Engines, 9 tooth starter gear.