From the factory the Harley-Davidson Dyna motorcycle delivers enough power to appease most riders. But there’s always room for improvement. One of the quickest and easiest ways to give your Dyna a boost and breathe new life into the bike is with an air induction upgrade.
With its roots established on motocross tracks and trails back in the 1960s, for more than 40 years K&N has been helping motorcyclists get more air and better protection for their bikes through high performance air filters, earning its reputation as a world leader in performance filter technology.

These days K&N has a plethora of air filter choices for Harley-Davidson Dyna owners that range from simple high flow OE replacement filters to performance intake assemblies that come with everything you need to really add some power, snap, and style to your Dyna.
High Flow OE replacement Air Filters

The OE paper filter that comes stock on your Dyna does an adequate job of filtering debris, but it does have its downsides, most notably it’s a one-time use application, meaning that once it gets filled with dirt and debris it’s time to buy a new one. K&N’s high flow OE replacement air filters are not only designed to provide your Dyna with excellent airflow to the engine, but they are also fully washable and reusable.


The high flow OE replacement filters for Dynas are designed to fit behind your stock air filter cover and feature a premium pleated pre-oiled cotton gauze media. The combination of the filter material and the design helps provide additional airflow and a large filter area which is designed to increase horsepower and torque. Another benefit is that the high flow OE replacement air filter will provide increased service intervals compared the stock filter and the fact that it’s washable, reusable, and comes with K&N’s famous 10-Year/Million Mile Limited Warranty, means that your filter will last nearly forever and quickly pay for itself over time.
If you own a 2014 to 2017 Harley-Davison Dyna Street Bob with a 103ci twin cam engine your bike will use the HD-1611 replacement filter.

The 2008 to 2016 Harley-Davidson Dyna models with the 103ci twin cam engine (except for 2014-later Dyna Street Bobs) will use the HD-9608 high flow OE replacement filter.
K&N’s HD-1499 replacement filter fits 1999 to 2007 Harley-Davidson Dynas with the 88ci twin cam engine.
For owners of 1992 to 1998 Harley-Davidson Dyna models outfitted with the 82ci Evolution engine, K&N’s HD-1390 filter will fit those models.
K&N’s Performance Air Intake Systems
K&N’s performance air intake systems offer much more in the way of power delivery and styling over their high flow OE replacement filters. Designed as easy to install, bolt-on applications these performance intake kits for Dynas come with everything you need to hop up your motorcycles airflow and help it look good at the same time.


K&N’s AirCharger intake system kit is guaranteed to increase the horsepower on Harley-Davidson Dynas. The AirCharger features a performance-driven, cast-aluminum, elbow shaped intake tube that feeds a large volume of high flowing air directly into an integrated velocity stack. Capped with an over-sized, cone-shaped, high flow air filter. This similar combination for the 2016 Street Glide (63-1134) has been shown to deliver an estimated increase of 6 horsepower and 6.5 lb-ft of torque. The AirCharger intake system kit comes with an integrated breather system making installation a snap. To complement the look and style of your Dyna, K&N offers the AirCharger intake system in two different styles and finishes.
AirCharger intake system 63-1137S features a silver finish with a raised K&N logo backed by fins racing along the spine of the elbow. This kit is available for 88ci twin cam Dyna models from 2004 to 2006, 96ci twin cam Dynas from 2007 to 2011, and 2012 to 2017 103ci twin cam Dynas.
Hot rod fans will appreciate the 63-1137. This AirCharger intake system has a matte black finish accented by a brightly machined K&N logo and speed fins. This kit is available for 88ci twin cam Dyna models from 2004 to 2006, 96ci twin cam Dynas from 2007 to 2011, and 2012 to 2017 103ci twin cam Dynas.
For those that want a more subtle and sanitary look K&N offers the AirCharger intake kit devoid of any logos or fins on the elbow to provide a perfectly uninterrupted finish. The smooth AirCharger is available in either bright chrome or jet black. Kit 57-1125P is the chrome version that fits certain 2001 to 2015 Harley-Davidson Dyna models with either the 88ci twin cam, 96ci twin cam, or 103ci twin cam engine. Kit 63-1125P is a chrome version that fits certain 2004 to 2017 Dyna models.


A more stealthy offering of the smooth AirCharger is available with a black powdercoated intake tube and mounting plate. Kit 57-1125 fits 2001 to 2015 Harley-Davidson Dyna models with either the 88ci twin cam, 96ci twin cam, or 103ci twin cam engine. Kit 63-1125 fits certain 2004 to 2017 Dyna models. When tested on a 2009 Harley-Davidson Softail the 63-1125 was shown to add an estimated 10 horsepower and 10 ft-lbs of torque. You can use K&N’s application guide to find out which AirCharger kit will fit on your Dyna.
Street Metal
K&N’s Street Metal series of intake kits for Harley-Davidson Dyna models offers old school looks with increased performance. There is a wide selection of styles to choose from in this series.


The Shaker intake kit is a nod to the hot rods that ripped the streets back in the day with its scooped design. Made from cast aluminum, the Shaker draws in a large amount of air with its ram-air design. Ribbed accents on the top help the Shaker mate up with the finned heads and jugs on the Harley engine for a seamless look. Underneath the scoop is one of K&N’s premium pleated, high flow, washable and reusable air filters that moves air directly into the integrated velocity stack on the backing plate to help achieve peak performance. The Shaker intake kit is available for 2001 to 2017 Harley-Davidson Dyna models with the 88ci, 96ci, and 103ci engines. The Shaker RK-3950S is available in a silver finish.
The K&N RK-3950 Street Shaker kit has all the same features as described above but this version is done up with a matte black finish with a machined K&N logo and fins.


The Street Hammer intake kit delivers a clean and simple look with its round profile, but more importantly it delivers big horsepower and torque. This kit was tested on a 2010 96ci twin cam Dyna Fat Bob and made an estimated 10 horsepower and 10 ft-lbs of torque over the stock air cleaner assembly. The kit comes with an aluminum backing plate, internal breather system, K&N’s high flow air filter, and a billet top cover. You get two options with this setup, you can either get it in bright chrome with kit RK-3933 or you can go dark with the black kit RK-3933B. The Street Hammer will fit 2001 to 2017 Harley-Davidson Dyna models with the 88ci, 96ci, and 103ci engines.
If you’ve done some engine work to your Dyna and beefed up its output with something like a big bore or stroker kit then you’ll want to pull even more air in to make sure you can create optimal power. That’s where the Street Hammer large capacity kit comes into play. With the same looks as its little brother, the large capacity differs in the fact that it’s a bit taller with a larger air filter. The taller K&N air filter allows for more air to pass through and extends the service intervals of the washable and reusable filter. Just like its little brother, the large capacity Street Hammer intake kit is available in either chrome RK-3933X or black RK-3933B and fits 2001-2017 Dyna models.


With its streamlined design the Flare intake kit complements the smooth curves and contours of the Iconic Harley-Davidson gas tank. Besides its stealthy appearance the Flare offers great performance gains. The combination of the reusable and washable high flow K&N air filter with the cast aluminum backing plate, and tapered oval cover has been shown to add more than 9 horsepower and 9 ft-lbs of torque on a 2010 Dyna Fat Bob. The kit fits 2001 to 2017 Harley-Davidson Dyna models with the 88ci, 96ci, and 103ci engines and is available in either chrome RK-3932 or black RK-3932B. You can also get a high capacity version that offers even more airflow if you have a modified or custom built engine in your Dyna. There’s a large capacity Flare in chrome RK-3932X as well as a black version with kit RK-3932XB.


RK-Series

If you are going for that sleeper look for your Dyna you’ll definitely want to check out K&N’s RK-Series air filter assembly. This kit delivers increased horsepower and torque all while utilizing your stock air filter cover. The RK-series kit for Dynas comes with a K&N high flow air filter that is washable, reusable, and covered by the famous K&N 10-Year/Million Mile Limited Warranty. Easy to install, the kit includes a powdercoated aluminum backing plate with an integrated dyno-tuned velocity stack for optimal performance. The RK-series is great for those that want to maintain the factory look on their bike but want more power. This setup has been proven to add an estimated 6 horsepower on a 2008 Dyna Street Bob. K&N’s RK-3931 will fit 2008-2016 Harley-Davidson FXD Dyna models with either the 96ci twin cam or 103ci twin cam engine.


You can use the K&N search by vehicle tool to find the correct air filter kit for your Harley-Davidson Dyna and then the K&N dealer search will help you locate a local K&N dealer in your area where you can purchase K&N products for your Dyna.


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