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Honda TRX 400 EX (99-14) DNA Air Filter R-H4AT05-01

104.40

Part Number:

R-H4AT05-01

Barcode:

5212008302313

Availability:

Available

Manufacturer:

DNA Filters

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Description

DNA High – Flow air filter greatly increases performance and hp. Full compatible with Honda TRX 400 EX.

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Filter Use

Road

Fitment Type

Vehicle Specific

Filter Design

Round Design

DNA Part Number

R-H4AT05-01

OEM Cross Reference

17254HN1000

K&N Cross Reference

HA-4099

Filtering Efficiency

98%-99%

  • four-stroke
  • 186whp@ 10.400 rpm
  • 13.55 kgm @ 7.100 rpm
  • 1,148 whp/kg
  • 162 kg (wet) CURB Weight
  • 11 liters of fuel

  • This filter features DNA's Round Design.
  • Installation of the filter is very easy, simply follow the information that can be found in the Honda workshop manual.
  • The filtering efficiency is extremely high at 98-99% filtering efficiency, with 4 layers of DNA Cotton.
  • This DNA filter is designed as a High flow filter for road use.

We are proud to announce that our DNA High Performance “Stage 3 MK3 Air Box Kit” for the KTM 990 Series motorcycles has been awarded with the prestigious Red Dot Product Design Award 2012.

The Red Dot design award ( www.red-dot.de ) dates back to 1955 and is now one of the world’s largest and most distinguished design competitions. The "Red Dot award: product design" is a world-class award presented to products released over the past two years that exhibit superiority in terms of a total of nine aspects, including innovation, functionality, ergonomics, ecology, durability and design. DNA High Performance Filters with its innovative and environmentally friendly design has proven that can compete with the best in the industry and convince an international and independent top-class jury. We were able to prevail over extremely ambitious competitors in one of the most renowned design contests in the world.

This year, 1,800 manufacturers and designers from 58 countries were hunting for the acknowledged Red Dot – the quality seal for aesthetic forms and lasting trends.4,515 products had to be assessed by the jury composed of 30 international experts. As always, they tested and evaluated live and on-site in Essen, Germany. Due to the consistently high quality of the products submitted, it was not easy for the renowned experts to make their decision. In the end, only the best of the top-class field of participants could prevail, DNA Filters was among them.

Since 1955, when the Red Dot design competition started, it’s the very first time that a “Performance Air Filter Company” has been awarded with a “Red Dot Product Design Award” for an Air Filter product! DNA Filters with Mr. Dino Nikolaidis, company’s founder, CEO and Designer of the MK3, is proudly the First worldwide!

Mr. Dino Nikolaidis comments: "I am deeply touched and honored to win the prestigious Red Dot award. Our total commitment to quality and innovative design of environmentally friendly products has proven that a Hi Tech engineering company from Greece can prevail among the best and lead the industry with its products. The DNA “Stage 3 MK3 Air Box Kit” is a Hi Tech passion item, completely machined out of billet aluminum alloy, increases the performance of the bike and represents the company’s philosophy for stimulating the emotions of the rider; now with the Red Dot Seal of Quality it is even more desirable. It is a perfect example of our dedicated passion for excellence that is applied to every DNA product."

Professor Dr. Peter Zec, initiator and CEO of the Red Dot design award, pointed to the high quality level of the competition: “The most distinguished products of the respective branch of industry faced up not only to the tough competition this year again, but also to the critical eye of the jury. The experts thoroughly examined, tested and evaluated each individual entry applying the highest standards. With their performances, the laureates did not only demonstrate an extraordinary design quality but they also showed that design is an integral part of innovative product solutions. At this high level, the winners are able to increase their potential for success on the market considerably by purposefully using our design prize.”

The DNA “Stage 3 MK3 Air Box Kit” will be included in the Red Dot Design Year book 2012-2013, presented at the Red Dot Design Museum in Germany, at the Red Dot Design Museum in Singapore and will be listed in the Red Dot Online exhibition, for one year from the day of the award ceremony. The award ceremony took place at the Aalto-Theater, Essen 2nd of July 2012 and the celebration continued the same evening at the Design Zentrum Nordrhein Westfalen, the Red Dot Design Museum in Essen, Germany.


DNA winner of the prestigious international product design award “Reddot Product Design Award 2017”! DNA Filters proves to be a worldwide pioneer once again. The International recognition throughthe Red Dot Product Design Award as well as the top quality of its products and the persistence toperfection make its loyal followers proud. Marios Nikolaidis, Motorsport Engineer of R&D/Production Manager of Greek DNA Filters, designed a range of innovative air filters that combine the unique DNA filtering technology with special synthetic “leather skin” in a variation of colours.

Customizing and modifying bikes has been the new trend over the past couple of years, creating Cafe-racers, Trackers, Bobbers and Cruisers. DNA and Marios Nikolaidis latched onto the new trend and launched a new series of innovative air filters under the “Leather Top” sub-brand. With the new award-winning DNA Leather Top Filtersseries, the air filter is now perfectly suited to the Custom Motorcycles’ exterior,providing a unique added value to the customized bikes, ready to satisfy even themost demanding rider.

The synthetic Leather texture is applied to the famous DNA Universal filters using a state-of-the-art“in mold fusion” technology. The range consists of “hexagon” “oval” and “U” shapes in brown, beige, green .yellow, blue, grey, orange and red colours! The leather top has a 3D convex shape engraved with the “D” of DNA. An incredible palette of colours and shapes was created which in combination with the top performance eco-friendly materials overwhelmed the Red Dot committee and made the leather-top filter the next best thing in customizing.

The Red Dot Product Design Award ceremony 2017 will take place on the 3rd of July 2017 in Essen, Germany at the Design Zentrum Nordrhein Westfalen. The award-winning Leather Top DNA filters will be featured in the prestigious Red Dot Design Year Book 2017-2018 as well as in display atthe“Red Dot Design Museums” of Germany and Singapore!


  • Sales and Administration office
  • Senior Management presentation hall
  • R&D department
  • Dyna & Cell & Ice support
  • Mold and Tooling department
  • Main office regional production department
  • Three Filter production lines
  • Quality control
  • Composite department
  • Packaging porters
  • Warehouse, order processing and shipping department

Equipped with the most modern, advanced technology machinery and systems, the plant's annual production capacity is approximately 300.000 DNA® air filters, 5% is sold in Greece and 95% is exported to over 42 countries worldwide.


  • Increased air flow
  • Better filtering efficiency
  • Smooth unified air flow
  • Improves the air flow dynamics of the air box
  • The advanced filter design corresponds to the advanced design of the modern air boxes

Concerning air flow, we have measured an increase that starts from +20% up to +80% for a given application! This can be translated in increased performance and longer service intervals.

Concerning filtering efficiency (FE), the larger active filtering surface allows the air to pass at a lower speed, so the filter has more “time” to “do its job” improving even more the FE of the filter. Following you can find a visual comparison of OEM & competitor’s air filters and DNA’s Fcd Design High Performance Air Filters, that will help you understand very simply “what DNA Fcd Design Technology is.


The technology that our DNA filter uses to clean the air is surprisingly common to all of us. It is part of our body; we use it constantly to stay alive! It is part of the Human respiratory system that filters the air we inhale! Tiny moistened hairs called cilia protect the nasal passageways and other parts of the respiratory tract, filtering out dust and other particles that enter the nose with the breathed air. The DNA filtering cotton media is exactly that, millions of tiny fibers that are oiled! This “hairy hybrid” as we call it, is a genius combination of cotton fibers per square millimeter. The Tex & Thread, of this unique cotton, is a result of intensive research and testing, by DNA’s development engineers. The “hairy hybrid” impregnated with DNA’s special filter oil, is transformed into the remarkable DNA media that provides very high filtering efficiency and extremely high flow rates.

We designed the DNA filter to aquire a positive static charge as the air passes through the pleated and oiled filter media. This weak static chargewill very effectively “pull” on the oiled cotton fibers, the debris and dust that are in the air; remember in science class at school, the pen rubbed against wool that can attract small bits of paper, experiment? This is exactly what happens, as air flows through the filter, debris even as small as 5 microns will change course and stick onto the fibers, regardless if the “holes” between the fibers can be as large as 150 microns! The first layer of debris on the fibers will then absorb some oil, get statically charged and become part of the filtering media! And guess what, it will start attracting new debris assisting the cotton media in its filtration chore! Finally, debris will continue building up on the surface of the filter, as air passes through, until it is totally covered.

Our filters have being successfully tested even in the harshest environment during the DAKAR Rally! Through Argentina, up to the Andes, and down to the Atacama Desert in Chile. The dreadful “Fesh- Fesh”(Guadal) fine powder desert sand of the Atacama Desert, was successfully kept out of the race engines, outperforming the foam filters! So the myth is busted, the DNA filters can successfully be used in any environment, on and off the road, in the desert or the outback, DNA will be there to protect you.

The DNA filter will also smoothen out the air flow stream, as it passes through the filter, reducing turbulence and sending smooth clean & fresh air towards the engine intake, increasing torque and power. Additionally to the high air flow, smooth and unified air flow is very important. This explains why we see a decrease in power output when testing a bike or car on the dyno “without” a filter as the circulation of air in the air box is disturbed and the result is turbulence and low power output.


Our sales team creates a development list based on a detailed market research, feedback from our customers, new vehicle releases, etc.

Vehicles and Air boxes are outsourced and shipped to our R&D department.

Our R&D engineers will study each case and decide the optimum workflow of the tests.

Typical workflow would be: air flow testing of the stock filter, dyno testing, fitting testing, sealing testing, filtering efficiency testing, air box dynamics testing and material analysis.

Engineering At this stage the stock air box is 3D digitized using Faro or Microscribe 7 axis arms, and all data are stored in our CAD system.

Following all the tests, the data are processed using special software developed by DNA and 3D design ideas are presented by each R&D engineer.

The best idea is chosen and further evaluated. If the result is positive, the filter is 3D designed (CAD), and a series of prototypes are made using rapid prototyping technology. Each prototype features a different “size DNA filtering media”, a selection of pleat, height and pitch.

All the prototypes are tested on our own Rotronics computerized Flowbench and on our in-house dyno center. The one that shows the best results is chosen.

This design is then finalized, all the mold manufacturing details are sorted out, and the mold-tooling is designed.

The tooling 3D CAD file is then processed with our CAM software, toolpaths are generated and the CNC machining programs are sent to the machine centers for mold-tooling manufacturing.

When tooling is ready, any necessary additional fixtures and production automation equipment are prepared and pre-production batch (zero series batch) is manufactured. The zero series batch allows us to fine tune all the details, test the actual air flow, efficiency, dyno test and set up the production workflow and quality control.

At this stage cost is calculated and the MSRP is set, not in the beginning of the development. Cost only, is not our main target; targets are: quality, airflow, innovation and then cost!

As soon as the zero series get a “PASS” from quality control, air flow testing, efficiency and dyno testing...

The DNA filtering media for this new filter is produced.

The filtering media is forwarded to the production lines and production starts from batch No1. Each production batch is carefully quality controlled and forwarded to...

Gasket gluing! Yes, our gaskets are factory glued, using high quality industrial grade adhesives and EVA foam gaskets, because this is the only way to ensure that the gasket will be correctly placed and stay in place for a lifetime. Then, the batch is forwarded to...

Our oiling stations. Following the oiling process the batch is forwarded to the...

Quality control and air flow testing again. All filters that pass are then forwarded to...

The packaging department. Filters are packed and forwarded to our warehouse. Official DNA Filter Release At this stage the new DNA filter is officially announced, including technical info and pricing, to the distributors, dealers and our DNA web site. And of course it is immediately available.

The logistics center will then process all the orders received by our sales department, will pack and ship them to our network of distributors and dealers worldwide.


We, at DNA, produce and introduce a filter that can last the life of the vehicle. Strict quality control, construction & materials, chosen only by their highest quality, are some of the factors that allow us to offer a Lifetime Warranty!

High performance, starts from using the best materials available that meet the high DNA standards. High fuel strength, high temperature and UV radiation resistance properties, is a must for our materials.

We call it “Advanced Environment Friendly Engineering”. We use Eco friendly materials, like our 100% organic cotton instead of paper or synthetic foam.

Hi-tech, precision CAD design (computer aided design) & CAM (computer aided manufacturing). Revolutionary & unique design solutions like the Full Contour design (FCd) which expands the active filtration area up to +80%, the factory glued, high quality EVA foam seals, to ensure a correct & secure sealing and easy filter installation, are some of the features that make every DNA the best air filter money can buy.

CNC machining, In-House tooling manufacturing, industrial automation & robotic production systems etc, combined with our attention to detail and continuous quality control, ensures that each and every DNA is a product of Advanced Air Filter Engineering.

Air box Reverse Engineering using Faro & Microscribe 3D Arms. CAAFT (computer aided air flow testing). In-House dyno testing on every single product, using our expert tuning know how

DNA increased air flow means increased engine power & torque up to +12 hp increase (common for some applications), resulting in crisp throttle response and better control. Translate this as increased dynamic safety that you will discover from the very first moment you will use our products.

Search no more for the best combination of protection! DNA High Performance Air Filters, “trap” all the dust particles that flow towards the filter, even the very fine ones down to 5 microns! guaranteeing that only the thing that passes the filter is just clean & fresh air.

DNA lives where ever high performance is a winning element. We have the will, the product, the custom solutions and the experience to excel in the toughest testing environment: motorsport! Inside every DNA Filter breathes a World Champion!

DNA is constantly on the move looking for new frontiers, searching and testing new materials and manufacturing processes, to keep efficiency, power & protection on the highest levels, to be always one step ahead: the standard for high performance air filters.

esides the presence of environment friendly materials and the fact that you will never have to throw away our filter, the overall DNA performance properties, translates to lower emissions and better fuel economy! These are the results of a healthier, cleaner operating engine, under all driving conditions, without forgetting to mention the safety aspects that come with this improved engine performance. Of course all these mean that using a DNA filter you get more out of your vehicle: Increased power delivery & cost efficient use!

We’re coming closer to you every day. In a car or with our motorcycles, driving on favorite roads, beyond them or at the racetracks around the world, DNA will always be there to transform air into power. To ensure that you will keep on smiling on every occasion!


  • Pioneering Technology: We lead with innovations that redefine what's possible, setting new standards in the motorcycle industry.
  • Bespoke Engineering: Each of our products is tailor-made, ensuring that every rider enjoys a unique and perfectly tuned experience.

Our vision is centered on enhancing human experiences, forming the foundation of our corporate structure. This vision is supported by core values that drive our company, much like building blocks, while our advanced technical expertise serves as the glue that holds everything together. Together, these elements create a robust platform for delivering products that resonate deeply with our customers' needs and aspirations.

Riders experience pure satisfaction from the perfect harmony between themselves and their machines, a harmony we meticulously craft through technological innovation and individualized engineering.


We Made it There

We Can Make it Anywhere!

Tested and proven winning performance, where only the absolute best is good enough. Top of the class, top of the world. Inside every DNA High Performance Filter, breathes a World Champion!

Competition & Race winning Heritage!

We are proud that DNA High Performance Filters are used by many top race teams and tuners all over the world, officially or unofficially. Our R&D department is working closely with top race mechanics and tuners to fulfill their needs and develop air filters that will satisfy even the most demanding technical partner. All the technology and experience gained is then used to improve even further the DNA products that we supply worldwide.

We create and deliver the new, global, Custom Biker's addiction. DNA applies its Advanced Air Filter Engineering to the Customizing and Modifying Biker's world. Let's Rock!

Custom projects worldwide

We started many years ago with our Japanese partners and we are here today with our worldwide partners. Creating universal filters for your projects and custom bikes with the best possible design and materials available.

DNA is the only company worldwide with Billet Top, CNC machined, universal filters and Leather Top, synthetic leather... in hundreds of different dimensions and designs. We are and we will always be here for assisting you with your one-off special project!


  • Excellent customer service skills.
  • Experience in aftermarket motorsport performance parts, retail and commercial customer relationship.
  • Ability to articulate clear ideas.
  • Excellent communication skills and negotiation skills.
  • Ability to build effective relationships with customers resulting in achieving sales targets.

The DNA sales team works closely with our distributors & dealers, supporting and motivating them in achieving their goals. If you are interested in working with DNA Filters you are welcomed to contact us and discuss with our sales team your specific need.


The DNA Stage 2 Kit, can be either a DNA filter or a DNA cover that is designed to replace a part of the air box, seriously increasing air flow to the engine. With the proper fuel recalibration the results are always very impressive.

The DNA Stage 3 Kit, consists of a complete air box and filter, designed to replace the existing OEM air box, improve air circulation around the filter and air flow to the engine. Power increase up to 12 HP is common with the S3! The S3 includes all the necessary hardware and installation information.


  • Mass of the air
  • Flow of the air
  • Temperature of the air
  • Absolute air pressure
  • Differential air pressure
  • Speed of the air at various points (Pit ot tubes)
  • Absolute humidity of the air


The complete procedure is automated and computer controlled, eliminating human errors.

DNA Warranty

Power by quality you can trust!

We, at DNA, proudly introduce a filter that can last the life of the vehicle. Strict quality control for construction & materials, chosen only by their highest quality, are some of the factors that allow us to offer a Lifetime Warranty!

The DNA Cotton
This very special cotton is designed by DNA's R&D engineers for High Performance filtering purposes. The basic media is a non woven surgical cotton gauze with a modified TEX & THREAD, with extremely high strength of break. This unique cotton media, actually is a “hairy hybrid” featuring extremely high air flow rates and excellent filtering efficiency that exceeds 98%.
Product Videos

Watch our videos for instructions and tips about our products on YouTube.

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DNA Guarantee

Lifetime Warranty!

The DNA High-Performance Filter is a next-generation, high-quality air filter made of multi-layered, 100% cotton gauze, infused with special DNA oil.

Frequently Asked Questions

Yes and even better, the DNA filters have a filtering efficiency of minimum 98% (ISO 5011 test). Good quality OEM paper filters are from 97% to 99% and the foam filters are from 92% to 97%.

The percentage of dust that the filter retains during a laboratory test, following the ISO 5011 protocol.

It was brought to our attention, so we purchased the filters and tested them back to back at the same set pressure, with our DNA and the stock OEM filters. Well guess what, the data claimed were false, nothing to do with the reality! Of course the flow was higher than the stock but much lower compared to the DNA! No wonder they never compare it with the stock, as they can't claim 300% (!) increase in air flow over the stock OEM filter. Only data measured back to back the same time are comparable, don't forget we are measuring air! This is why we always publish the stock OEM data.

DNA has developed a unique filtering media that is perfect for off-road use. During the toughest rally in the world, DAKAR 2011 in Argentina - Chile, one of the factory Aprilia 450 Rally bikes, was racing with DNA filter. The results were very impressive compared to the rest of the team's bikes racing with foam filters. Every evening when the bikes were serviced, compared back to back the DNA filter and the foam filters, absolutely no dust had passed through and the engine was like new! Not to mention that one filter was enough for each day, compared to 2 or 3 foam filters per day the other bikes had to use. So this myth is busted!

Absolutely no, DNA uses very special thixotropic polyurethane that will not leak in the filtering media reducing the active filtering area, when we produce our round filters. Concerning the panel filters, we will allow a controlled 3 to 5 mm leak, that is nothing compared to the uneven 10 to 15 mm leak that our competitors have.The DNA FCd design is an innovation by DNA. It allows the pleated filtering media to follow precisely the air box contour, regardless the complexity of the shape. Using the complete footprint of the air box, we eliminate "dead spots" that rob power and at the same time seriously increase air flow. Using DNA FCd technology, at least 20% and up to 80% more filtration area is common!
The DNA FCd design is an innovation by DNA. It allows the pleated filtering media to follow precisely the air box contour, regardless the complexity of the shape. Using the complete footprint of the air box, we eliminate "dead spots" that rob power and at the same time seriously increase air flow. Using DNA FCd technology, at least 20% and up to 80% more filtration area is common!

Filtering efficiency is the amount of "dirt" the filter can maintain (stop) and protect the engine efficiently. For example, the DNA Filter for every 100 grams of dirt that it will receive, it will "trap" 98-99 grams, and this applies even to fine dirt as small as 5 microns.

DNA uses the most advanced computerized ROTRONICS flowbench available today. The complete procedure is computer controlled/automated, to avoid human error. Additionally, wa always test the DNA filters back to back, the same day and time, with the stock OEM filters and publish the results. Reading our data, you can immediately see the differences in air flow, between the 2 filters and what to expect by using the DNA filters.

In cases the air flow of the DNA Filter is extremely high we include with the filter special instructions.

No, you must never use the DNA filter un-oiled. The oil is a crucial part of the filtering media. You must always apply the Special DNA filter oil, not just any oil, after servicing the filter.

Race bikes must be kept always in top condition, especially the engine. Debris and flying bugs found at the track, plus rubber from the bikes' tires in front, can seriously damage the engine. DNA will provide the maximum air flow and at the same time maximum protection. We do not compromise filtering efficiency in order to increase flow; we increase air flow using our revolutionary FCd design, maintaining the 4 layer reliable DNA filtering media. If you want the highest air flow and filtering efficiency of 98% for your race engine, then your only choice is DNA.

The servicing intervals depend on the environment that the vehicle is used. Once a year or every 15.000 to 30.000 km is suggested, to keep your DNA filter in top condition. An easy way to check if the filter needs cleaning, is to see if the wire mesh that that is on the dirty side, is visible.
If you can see the mesh, you can continue using the filter. If the mesh is totally covered in debris, you must clean the filter.

Absolutely no! You must treat your DNA filter as delicate textile. How woulld you clean an expensive and delicate garment? First of all read the cleaning instructions, then follow them carefully. Every DNA filter packaging & the DNA service products include detailed cleaning instructions. The procedure is very user friendly.

We offer premium motorcycle and auto parts, ensuring high performance and quality!