Hardin Marine

Aluminum S-Pipes Universal (pair)

These S-pipes are used to lower your exhaust exit location 12" They are 4" indiameter and enable you to lower exhaust exits to clear swim steps, steering,etc They simply install with hose and clamps sold separately.

These S-Pipes extend 13-1/2" from inlet to outlet with a 12" drop.

SOLD AS ONE PAIR.

• 4" Diameter.
• Constructed of High Quality 316L Stainless Steel.
• 316L Stainless Steel is specially formulated for harsh marine environments with much superior corrosion resistance over standard 304 stainless steel. 
• Tip includes internal flap.
• Sold Each.
• 45 Degree Angle Cut.
• Use Silicone to seal to Transom.
• Length Overall: 11-1/2", Flange To Inside End: 5", Flange To Outside End: 6-1/2"

4" 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. Length 8-3/4", Flange to Inside end 5", Flange to Outside end 3-3/4".

Sold in pairs.

4" Below Platform Low Port Tailpipe Kit

This is the same low port tailpipe used on the popular Hardin Marine Cyclone and Gil manifold systems. Designed to allow vertical adjustability to fit most applications with the floating elbow and rubber hose connections. Sold in pairs, tailpipe hardware is included.

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.

4" Cast Aluminum 85 Degree Exhaust Elbow (Each)

• ID 3.630
• OD 4.00
• OD on the hose barb 4.175

This 85 degree elbow can be used on any exhaust application Commonly used to attach center rise exhaust systems to factory Y-pipes or below platform exhaust exits.

4" Cyclone "HP" Series Inline Silencer, Polished, Sold In Pairs
For Engines Up To 650 HP (10" Long)

These silencers are designed for the customer seeking a simple "clamp-inline" version of the popular Cyclone silencers. By offering silencers in 3", 3-1/2", 4", and 4-1/2" inlet and outlets and sound expansion chambers of  4", 4-1/2", and 5", these units offer maximum noise reduction while retaining maximum power.

Constructed of all 316L stainless steel for maximum corrosion resistance.

• Kit for 4" Exhaust Tip.
• Easy Installation.
• Includes: (3) Stainless Steel mounting screws and (1) Gasket.
• Fits all Hardin Marine 4" exhaust tips.

• 4" Diameter.
• Constructed of 316L Stainless Steel.
• Tip includes internal flap.
• Sold Each.
• 45 Degree Angle Cut.
• Use Silicone to seal to Transom.
• Length Overall 17", Flange to Inside End 5", Flange to Outside End 12".

• 4" Diameter.
• Constructed of 316L Stainless Steel.
• These tips include flaps.
• These tips accept our popular slip-in silencers.
• These tips will also accept external Salisbury flappers.
• Sold Each.
• Use Gasket Silicone to Seal to Transom.
• Length 15", Flange to Inside end 5", Flange to Outside end 10".

4" Flush Mounted Exhaust Tip (Sold Each)

This tip is perfect for when you need an exhaust tip that does not protrude from the transom. The unobstructed look is a very clean look. Constructed from 316L Stainless Steel and uses an internal anti-reversion flapper for safety. Flange Diameter is 6". Depth is 5". Hose connection is 4". Mount Hole center to center is 4-9/16"

HCX Competition Series Offshore Mufflers
4" O.D. x 8"Long  (Pair)

HCX Offshore Competition Race Mufflers Design and Function Faster & Quieter

With decades devoted to marine exhaust technology Hardin Marine knows a HIGH horsepower muffler does not work by restricting flow. There is a balance between noise reduction and horse power retention. The HCX series mufflers tuned free-flow unrestricted design along their with strategically placed louvers streamlines your boats exhaust flow reducing back pressure while also adding a level of sound deadening and providing up to 8 decibels (8" version) of noise reduction and an incomparable deep, rich sound.

In order to offer maximum exhaust flow in its most basic sense and for the muffler to reduce noise, it must separate that noise (sound waves), by separating the peaks and valleys produced by the exhaust note. These sound waves are then absorbed throughout the length of the muffler, the harsh (Loud) noise notes can be some what neutralized through this technology this is exactly how the HCX series muffler achieves this.

These mufflers provide the long awaited option to the numerous 750+ horse powered boats that longed for a muffler option that wouldn’t rob them of their available horse power and that could also be easily installed and removed for various boating environments. The lightweight design is perfect for dry tailpipe applications but they can also be used in wet pipe applications. Common applications are high horsepower, supercharged or normally aspirated engines. Each muffler is precision TIG welded utilizing all stainless steel construction. The muffler are a standard 8" length with a 4" O.D. They are easily removable with just 1 hex screw (no special tool needed, just a standard size allen wrench)

• All Stainless Steel Construction
• Strategic louvered design provides noise reduction
• Available length 8"
• Perfect for Dry or Wet exhaust systems
• 4" O.D available
• Maximum flow
• Simple single bolt installation
• *Note: Custom made, 2-4 weeks to build. Please Note the inside diameter of your exhaust pipe. below.

4" Hi-Performance Silencer For Water Injected Headers

These high performance silencers feature large stainless packed louvered design cores for maximum performance through a muffler system They are ideal for blown or high compression engines.

They are 10-1/2" long and slip in a 4" header collector Best suited for higher horsepower applications.  Sold in pairs.

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.

4" 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. Note: Flaps are recommended in all wet exhaust systems. Sold each.

4" Long Billet Aluminum 3/4" Tapered Shaft Adapter

• Powdercoated billet aluminum shaft adapter
• Fits 3/4" Round tapered shaft with keyway
• Long 4" Version moves steering wheel closer to driver
• Top Diameter 2-1/2", Bottom Diameter 3-1/2", 4" Tall
• Features a standard 3-bolt steering wheel /adapter mounting flange
• Attractive tapered design to match most steering helm bezels
• Steering wheel adapters are available in 5, 6, and 9-bolt patterns
• Fits Teleflex, Morse, Uflex (see note) and helms and more

Need help installing your new shaft adapter? Check out this handy tutorial!

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

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.

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.

4" Replacement Flapper for Gil Composite Tips, Oval Shape

These kits include a replacement flap and flange. 1-1/4" center to center on bolt holes, 3-7/16" wide, 4" tall.
These will fit in #420-903285, #420-903290, #420-903280, and #420-400383 exhaust tips.

4" Rolled Edge (Bullnose) Exhaust Tip - (Sold in pairs)

4" Silent Seal Easy Service Exhaust Flapper Assembly (Each)

At last an answer to eliminating the annoying clanking and banging caused by old design stainless anti-burn exhaust flaps. It seems the many complaints of knocking engine noises and fears caused by the sounds of anti-burn flaps have created the demand to develop and cure this problem once and for all. The all new "Silent Seal" exhaust flap with its special high temp burn resistant rubber compounded exhaust flap and stainless steel cage design provide the perfect answer. This new flap design provides a superior seal and quiet operation. These flaps can easily be retrofitted to earlier style tips with just minor brazing or welding of the flap cage to your exhaust tip. Flap is 3.850" OD with 1" center to center bolt mounting holes.

4" Silent Seal Easy Service Exhaust Replacement Flapper (Each)

These kits include a replacement flap, (2) two screws and (2) two flanges (front & back) to replace old or damaged flaps in Hardin Marine 4" exhaust tips.
These will fit in #410-281400, #410-281401, #410-281402, and #410-281403 exhaust tips.
These will fit in #410-280185, #410-280190, AND #410280195 Flap Assemblies.
The mounting holes are 1" apart

These flaps are 3.850" in diameter to fit the inside of the 4" Hardin exhaust tip.

4" Silent Seal Replacement Flapper

This flapper is manufactured from a high temperature, burn resistant special rubber compound.  This is the same flapper used in part number 410-280179 Silent Seal flapper Assembly.

4" Slip-In Silencer

These silencers are one of the best values on the market today Their unique louvered design out flows all other imitations with holes These silencers are constructed from 100% stainless steel and their compact 5" length makes them easy to install in most exhaust tips and water injected headers Decibel drops of 8 to 10 are commonly seen. Best suited for under 425 horsepower applications.  Sold in pairs.

Aluminum S-Pipes, Stainless Steel Tips, Hose & Clamps Exhaust Kit

• Tips and S-Pipes have 4" diameter
• Angle Cut Tips are Polished 316L Stainless Steel
• S-Pipes are black powder coated Aluminum
• Enables you to lower exhaust exits to clear swim steps, steering, etc... 
• Simply install with included 4x 8" hose Sections and 16x clamps.
• The S-Pipes extend 13-1/2" from inlet to outlet with a 12" drop.
• SOLD AS ONE PAIR.

Aluminum S-Pipes, Stainless Steel Tips, Clamps & Hose Exhaust Kit

• Tips and S-Pipes have 4" diameter
• Straight Cut Tips are Polished 316L Stainless Steel
• S-Pipes are black powder coated Aluminum
• Enables you to lower exhaust exits to clear swim steps, steering, etc... 
• Simply install with included 4x 8" hose Sections and 16x clamps.
• The S-Pipes extend 13-1/2" from inlet to outlet with a 12" drop.
• SOLD AS ONE PAIR.