Hardin Marine

Seaward Standard Risers - Sold As A Pair

Serpentine 6-Rib Alternator Pulley (Fits a .670" Round Shaft) Fan sold separately

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

Shaft for Gen 7 Plus Sea Pump

Shaft snap ring for Gen 7 Plus Sea Pump. Also fits Ram Force II pump replacing part number 625-4254

Shaft Spacer Sleeve for Gil / Hardin Offshore 3/8 Hole Clamp Type, Sea Strainer

Designed to fit Gil Generation 2 (Single Knob) and Hardin Offshore Generation 1 Sea Strainers.

Shoot Thru-Hull Transducer with 25' Cable

• Available: (10) Ten
• Condition: New, Old Stock

Short Aluminum Valve Cover Breather - 2-3/4" Tall (Each)

• 2-3/4" Height
• 3-3/8" Base Length
• 1-7/8" Base Width
• 2-1/8" Bolt Hole Center to Center

These breathers are designed to mount to the top of the valve cover with no bolts exposed. Each breather is highly polished.

Short Billet Vent 7-1/2" x 3-1/2" - Each

These long style billet aluminum vents offer the provision to use a bilge blower hose to exhaust fumes in your engine compartment. Each vent measures 7-1/2" x 3-1/2" and each of these will accommodate the short style billet grab handles.

See what each of our powder-coated finishes (both flat and glossy) look like under different lighting here!

Side Entry Billet Remote Cooler Sandwich Adapter - Generation 4 Big Block Chevy

These unique adapters are used when a filter is desired to be used in a block mounted fashion.  This unit lowers the original filter location by 1-1/2" while providing 1/2" NPT inlets and outlets.  The factory oil bypass is eliminated in this situation.

When a marine engine is installed in the bilge of a boat there is little or no access to the bottom of the engine therefore a remote mounted oil filter is required.  An oil filter block off adapter must be bolted on the original oil filter location to accomplish this.  These block off adapters are constructed of 6061-T6 billet aluminum and then beautifully anodized for superior corrosion resistance in harsh environments.  They are completely O-ringed on the sealing surfaces to eliminate oil leaks, copper sealing washers are NOT used under the mounting bolt heads.

Side mount bow lights that are flush mounted in the hull of your boat. Sold in pairs. Measures 7-3/4" Long by 2-3/8" Tall. Light Fixture is 3" Deep

Supercharger Fuel Line
Side Mount Dominator 4500 Fuel Line, -8 Inlet (Each)

These gorgeous stainless steel fuel lines with anodized fittings and aluminum supercharger fuel logs are available as a kit or individually.Designed for connecting both side mounted fuel lines together while providing a fuel reservoir close to the carburetor. This fuel log has a male -8 AN fuel inlet (2) -6 AN female fuel outlets while providing a 1/8" NPT port for a fuel pressure gauge. This is the ultimate in a sanitary installation.

Supercharger Fuel Line
Side Mount Standard Holley 4150 Fuel Line, -8 Inlet (Each)

These gorgeous stainless steel fuel lines with anodized fittings and aluminum supercharger fuel logs are available as a kit or individually.Designed for connecting both side mounted fuel lines together while providing a fuel reservoir close to the carburetor. This fuel log has a male -8 AN fuel inlet (2) -6 AN female fuel outlets while providing a 1/8" NPT port for a fuel pressure gauge. This is the ultimate in a sanitary installation.

Silicone / Metal Valve Cover Gaskets - Valve Cover Gasket Fits All Big Block Chevy - Sold in Pairs

Hardin Marine's Perm-Align valve cover gaskets are specially designed for that hard driving, all-out racer who wants to be sure that he has the best protection against valve cover leakage caused by the valve cover gasket being blown out or sucked in by changes in internal engine pressures. The gasket is made of 30 durometer rubber vulcanized to both sides of a thin steel frame and will far outlast cork and rubber composite gaskets. They can be used many times. Black silicone color.

Sold in Pairs

Silicone / Metal Valve Cover Gaskets - Valve Cover Gasket Fits All Big Block Chevy - Sold in Pairs

Hardin Marine's Perm-Align valve cover gaskets are specially designed for that hard driving, all-out racer who wants to be sure that he has the best protection against valve cover leakage caused by the valve cover gasket being blown out or sucked in by changes in internal engine pressures. The gasket is made of 30 durometer rubber vulcanized to both sides of a thin steel frame and will far outlast cork and rubber composite gaskets. They can be used many times. Blue silicone color.

Sold in Pairs

Silicone / Metal Valve Cover Gaskets - Valve Cover Gasket Fits All Small Block Chevy- Sold in Pairs

Hardin Marine's Perm-Align valve cover gaskets are specially designed for that hard driving, all-out racer who wants to be sure that he has the best protection against valve cover leakage caused by the valve cover gasket being blown out or sucked in by changes in internal engine pressures. The gasket is made of 30 durometer rubber vulcanized to both sides of a thin steel frame and will far outlast cork and rubber composite gaskets. They can be used many times.

Sold in Pairs

• Constructed of Polished 316L Stainless Steel.
• 3/4" NPT Female Thread
• Outer Diameter 1-1/4"
• Overall Length 4"
• Dumps are perfect for intercooler, tailpipe, and even engine water discharge. 

• Easy Single Bolt Installation.
• Mounts most original equipment and aftermarket coils.
• Chrome plated steel.

• Two 22" Inside Hoses
• Two 4NPTx-6 JIC 90 Degree Fittings

Single Cylinder Power Assist Helm Unit

75cc

These Hardin Marine full time thru-prop and thru-hull diverters are a popular exhaust option for a silencing diverter system. This fixed device allows for a muffled sound that is suited for pleasure cruising and the open water. When matched with the extremely popular #410-284401 slip in mufflers you can create a quiet and quick to install system that meets most noise laws within the 50 states on any Stock 502 EFI or smaller production motor.

Our system enables the exhaust to exit through the transom and the prop at the same time by combining a silencer tip with the housing of a diverter (no electronics). At lower RPM's most of the exhaust will be heard through the exhaust tips. As RPM's increase more exhaust is forced through the Y-pipe, allowing optimum flow and noise reduction.

Fits Mercruiser 502, 454, 350, and 305 engines. SOLD AS A PAIR. INCLUDES DIVERTERS ONLY! ASSEMBLED PHOTOS ARE SHOWN AS EXAMPLES ONLY. HOSE, CLAMPS AND TIPS SOLD SEPARATELY. SEE RELATED PARTS

Single Groove Billet Crankshaft Pulley For Big Block Chevy

• Machined from 6061-T6 billet aluminum. 
• Set up for a Mercury replacement with deeper v-groove. 
• Comes highly polished.
• 6-7/16" Diameter
• 7/8" Height
• Available in Satin, Polished and Black