Hardin Marine

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.

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

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

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 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

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.

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

Berkeley Exhaust Manifold Riser - Jet, Oldsmobile (pair)

This is the riser for the popular square Oldsmobile exhaust manifold.  Thought by many to be extinct, but we have retooled and this product is available once again.  This has been America's favorite Olds manifold for years.

Exhaust Manifold Spacers - 1/2" Big Block Chevy, Non-Coated Billet Aluminum

These spacers are the answer to those times when you just need a little more clearance for tall valve covers or to get those tips to line up correctly. Sold in pairs.

Exhaust Manifold Spacers - 1/2" Small Block Chevy,  Billet Aluminum

These spacers are the answer to those times when you just need a little more clearance for tall valve covers or to get those tips to line up correctly. Port size is 1-1/2" x 1-1/2". Sold in pairs.

Exhaust Manifold Spacers - 3/4" Big Block Chevy, Non-Coated Billet Aluminum

These spacers are the answer to those times when you just need a little more clearance for tall valve covers or to get those tips to line up correctly. Sold in pairs

Exhaust Manifold To Riser Gaskets - Barr Riser Gasket with Slots (each)

Here is just a sampling of the popular exhaust manifold gaskets that we offer.  Each gasket is designed to withstand the high temperatures of marine exhaust applications.  Gaskets are sold individually.

Length: 5-1/2"
Width: 3-3/4"

Exhaust Manifold To Riser Gaskets - BBC Indmar Riser Gasket (each)

Here is just a sampling of the popular exhaust manifold gaskets that weoffer.  Each gasket is designed to withstand the high temperatures ofmarine exhaust applications.  Gaskets are sold individually.

Exhaust Manifold To Riser Gaskets - BBC Indmar Riser Gasket with Slots (each)

Here is just a sampling of the popular exhaust manifold gaskets that weoffer.  Each gasket is designed to withstand the high temperatures ofmarine exhaust applications.  Gaskets are sold individually.

Exhaust Manifold To Riser Gaskets - SBC Indmar Riser Gasket with Slots (each)

Here is just a sampling of the popular exhaust manifold gaskets that we offer.  Each gasket is designed to withstand the high temperatures of marine exhaust applications.  Gaskets are sold individually.

Length: 5-5/8"
Width: 3-7/8"

Exhaust Manifold To Riser Gaskets - Early Kodiak Gasket (each)

Here is just a sampling of the popular exhaust manifold gaskets that weoffer.  Each gasket is designed to withstand the high temperatures ofmarine exhaust applications.  Gaskets are sold individually.

Bolt hole center to center is approx 4" x 3".

Exhaust Manifold To Riser Gaskets - Late Kodiak Gasket (each)

Here is just a sampling of the popular exhaust manifold gaskets that weoffer.  Each gasket is designed to withstand the high temperatures ofmarine exhaust applications.  Gaskets are sold individually.

Bolt hole center to center is approx 4.75" x 3".

Exhaust Manifold To Riser Gaskets - Late Kodiak Gasket (each)

Here is just a sampling of the popular exhaust manifold gaskets that we offer.  Each gasket is designed to withstand the high temperatures of marine exhaust applications.  Gaskets are sold individually.

Bolt hole center to center is approx 4.75" x 3".

Exhaust Manifold To Riser Gaskets - LS Manifolds (each)

Replacement gaskets for the 620-32950 LS manifolds. Each gasket is designed to withstand the high temperatures of marine exhaust applications.  Gaskets are sold individually.

Bolt hole center to center is approx 4.75" x 3".

Exhaust Manifold To Tailpipe O-Ring - Hardin Hurricane/Typhoon Tailpipe, 6" O-Ring (Each)

Exhaust Manifold To Tailpipe O-Ring - Hardin Hurricane/Typhoon Tailpipe, 6.5" O-Ring (Each)

External Oil Pump Relocation Bracket, fits Big Block Chevy

• Polished Cast Aluminum 
• Dual internal baffles Breather is sloped to match the styling of the valve cover 
• Base measures 3-1/4" Long X 2" Wide with 2-3/8 Bolt Center to Center 
• Breather measures 4" tall. 
• Breather opening measures 1-3/4" Long x 1-1/4 Wide

Extreme Duty Hi-Performance D Port Exhaust Manifold Gaskets - 454/502/8.2L Chevy - Sold in Pairs - Replaces OEM Mercury #27-8M0065690

These gaskets are graphite impregnated and designed to withstand the highest of temperatures on high horsepower applications. For those of you looking to do the job only once, insist on Hardin Marine Extreme Duty gaskets. Quite possibly the last gasket you'll ever need. These gaskets are designed to be used in D port Exhaust applications. Replaces stock OEM Mercury #27-8M0065690

Sold in Pairs

Extreme Duty Hi-Performance Exhaust Manifold Gaskets - 305/350 Chevy- Sold in Pairs

These gaskets are graphite impregnated and designed to withstand the highest of temperatures on high horsepower applications.  For those of you looking to do the job only once, insist on Hardin Marine Extreme Duty gaskets.  Quite possibly the last gasket you'll ever need.

Sold in Pairs

Extreme Duty Hi-Performance Exhaust Manifold Gaskets - 429-460 Ford - Sold in Pairs

These gaskets are graphite impregnated and designed to withstand the highest of temperatures on high horsepower applications. For those of you looking to do the job only once, insist on Hardin Marine Extreme Duty gaskets. Quite possibly the last gasket you'll ever need.

Sold in Pairs

Port Style:Oval