Hardin Marine's Cyclone Series Full Time Silencers
The Cyclone series silencer systems have quickly become the worlds most sought after exhaust silencer systems. Through Aerospace inspired technology, the cyclone series silencers use an exclusive delta style core surrounded by a sound expansion chamber. This design have been proven to accelerate airflow through the silencers while redirecting the sound airwaves to reduce harsh exhaust noise. Adequate noise reductions of as much as 20% have been experienced without adversely affecting horsepower or torque. These silencers are constructed of nothing but the best in 316L stainless steel materials offering the very longest life span and superior corrosion resistance. Hardin Marine recognizes that there is no way that a "one size fits all" silencer could meet every boaters needs. Through extensive research and development, the Cyclone series silencers have been designed in four specific sizes, offering the perfect balance of power and noise reduction for any application.
One question we are always asked is how much noise is a decibel? Here is the definition of a decibel.
A unit of measurement of the loudness or strength of a signal. One deciBel is considered the smallest difference in sound level that the human ear can discern. Created in the early days of telephony as a way to measure cable and equipment performance and named after Alexander Graham Bell, deciBels (dBs) are a relative measurement derived from two signal levels: a reference input level and an observed output level. A deciBel is the logarithm of the ratio of the two levels. One Bel is when the output signal is 10x that of the input, and one deciBel is 1/10th of a Bel.
A whisper is about 20 dB. A normal conversation is typically from 60 to 70 dB, and a noisy factory from 90 to 100 dB. Loud thunder is approximately 110 dB, and 120 dB borders on the threshold of pain.
The chart below will give you an idea of some common noise sources and their decibel readings for you to compare.
Click on the part number to check pricing or place an order.
| Hardin
Marine Tomahawk Transom Mount Silencers |
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The new Tomahawk muffler is
the best on the market and it's affordable. They are available in
both full time and air
actuated diverting models. Now high performance engines can be
run at full throttle in the closed or full time position with minimal if
any back pressure. These mufflers are designed to have a minimum
150% cross sectional area. This means more airflow and more power
for you to enjoy. Maybe the best feature of the air actuated
system is that there are no actuating parts visible from the outside of
the boat. No ugly actuators, just clean lines.
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| Hardin
Marine Replacement 496 & 496HO Silencer System |
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This silencer system was
specifically designed and tested to comply with the J-2005 SAE testing
standards that are being rigorously implemented on national waterways.
The apparent problem that the Mercury 496 & 496HO is an open exhaust
configuration that does not comply with the latest noise level limits
required by law. This can now be rectified with these direct
replacement silencers. In recent testing by "Hot Boat" magazine
this system dropped the noise level to a legal 85/86 decibels.
Each contains 1 pair of highly polished 316L direct replacement silencer
tips plus 1 pair of external exhaust flappers. Sold in pairs.
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| Hardin
Marine XPM525 Performance Clamp-on Mufflers |
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Hardin Marine has just introduced their latest performance
mufflers, the XPM525. These new silencers address the J-2005 SAE test that
is now the standard in many states including California. In a recent
independent test, these silencers showed a 12.2-decibel noise reduction at
idle speed when mounted on the Mercury 525 engine package. This brought the
test boat down to 88db passing the stringent California noise ordinance
enacted this year. When installed on a test boat equipped with the 496
engine package, the mufflers brought it down to 88db. The XPM525’s are constructed entirely from 316L stainless steel in order to provide the maximum corrosion resistance available in saltwater applications. These mufflers do not have any moving parts or packing to wear out. The significant sound reduction is accomplished with a 5-inch 2-phase expansion chamber in conjunction with a center sound wave baffle. The unique down-turned design helps to keep spray and carbon residue from accumulating on the boats transom. Heavy-duty external exhaust flappers are included to prevent any chance of water ingestion through the exhaust system. Installation is simple. The XPM525 muffler system is designed to clamp onto any 4” O.D. tailpipe or exhaust tip using an integral stainless band clamp and a 1/8” set screw for added security. The mufflers are 12-1/2” in overall length. The meticulous hand polished finish bring these mufflers to a show quality shine making them a beautiful addition to any boat while maintaining their necessary functionality. Sold in pairs.
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| Hardin
Marine Cyclone Transom Mount Series Silencer: HP-T1 |
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This model Cyclone series silencers offer all of the same
distinctive construction features along with the advantage of sharing
the feature of the exhaust tip, by incorporating the silencer and the
tip into one unit. This unit is perfect for a factory looking
installation. The transom mount series is available in 2 specific sizes
for horsepower ratings: 1) 500 plus HP and 2) 600 plus HP. Both
a straight and an angled slash cut version are available. Sold in pairs.
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| Hardin
Marine Cyclone Series Clamp-On Silencer: HP-CL |
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These highly polished 316L stainless steel silencers are designed for
the power boater looking for the simplicity of simple slide-on and clamp
style installation and removal. These silencers share all of the
Cyclone's exclusive construction features and are available in 4 specific sizes
for horsepower ratings; 1) up to 425HP, 2) up to 500HP, 3) rating above
650. By matching the horsepower specifications, you can obtain the
perfect balance of a broad power-band with reduced noise. Sold in pairs.
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| Exhaust Silencer Hardin Marine Full Time Silencers |
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These full-time in-line silencers are perfect for almost
any application. They simply splice into your existing
hose, creating no additional modifications. Their 100%
stainless steel construction make them a perfect replacement
for fiberglass-style mufflers. Sold in pairs.
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| Hardin Marine
“Next Generation” Silencer System (Trumpet Tip Replacement) |
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For nearly three decades the
most common exhaust tip in use was the aluminum trumpet style exhaust
ports. Unfortunately, with the latest noise regulations now in place
this poses a significant problem due to the fact that there is no way to
mount or integrate a muffler/silencer to the trumpet tip. These newly
designed silencer tips share the same diameter mounting flange and stud
configuration as the original trumpet style tips did. They extend 6-1/2”
long from the transom mounting flange to the end of the tip and offer a
convenient 3” hose connection. Each set comes complete with external
flappers. Sold in pairs.
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| Hardin
Marine Stainless S-Pipe Muffler |
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This system is perfect for
solving excessive noise problems on boats equipped with low port exhaust
outlets. By incorporating the leading technology cyclone muffler
system into smooth transition 4" mandrel bent 316L stainless steel elbows
a 12" drop S-pipe is created. This system will replace most factory
and aftermarket 12" drop standard S-pipes.
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