DK Custom Products

Phone: 662.252.8828
Text: 662.420.4891
Email: [email protected]

Ultimate Dyna Performance


 Ultimate Performance Mods


 TRUE Stage I Upgrade is a sure fire way to increase performance.

BUT, having a free flowing air cleaner, free flowing exhaust, and a tuner is not the only way to get more power.

 Whether you want to wake up your stock Dyna with an Exceptional Stage I, or want to build your bike out to its maximum potential. 

Building a solid foundation is The Key to getting the most performance out of your bike, regardless of what Stage you go to. 


(If you already have done a "Stage I" and were disappointed with the lack of improvement...this is for you)

Combine the following mods on Your Dyna For Improved Performance You Can Feel.






Outlaw HiFlow Air Cleaner System

External Breather Systems

Black Finned HiFlow 606 Air Cleaner System Dyna Softail Touring DK Custom High Flow Harley Davidson performance air cleaner 606 intake kit K&N EBS External Breather System TBW Cable Operated



  • K&N A/C Filter (million mile warranty)

  • Low-profile backplates for more clearance

  • Vents blow-by externally rather than back into your intake

  • Lots of options for routing your EBS filter or Catch Can

  • Keeps your tune stable


The air cleaner is the foundation that all other engine mods rely on and plays a huge part in performance. It’s simple really; engines perform better with cool, clean, oxygen-rich air. Thanks to the EPA, our Harleys are being choked out and can’t breathe, putting a dent in their performance. Having an air cleaner that doesn’t route that hot, oily, oxygen-depleted air back into your intake will help provide the Ultimate Performance and Tune Stability. Also, having lots of routing options for your EBS catch can or filter is a plus. If you're not fond of the hoses, check out the External Breather Bolts.

See what happens to the inside of your engine with a typical Stage I air cleaner (no EBS) HERE.



Free Flowing Exhaust

Thunder Torque Inserts™



  • Reduced engine pumping losses

  • Better Fuel Mileage 

  • Increased Exhaust Gas Velocity

  • More Felt Torque


Technically speaking, exhaust systems cannot increase or decrease an engines power. However, they can have a profound effect on engine pumping losses, whether decreasing or increasing. The goal is to reduce engine pumping losses and increase exhaust gas velocity, resulting in more felt power at the rear wheel. Here’s a LINK to a more in-depth explanation of Harley exhaust and how it works. With the Thunder Torque Inserts™, you will have more low and mid range torque and the deeper, throatier sound is a plus. 






  • Cooler running engine

  • Less Lean running engine

  • Get rid of hesitation/stutter

  • Reduce flat spots

  • Stronger Acceleration


Some bikes, Twin Cams in particular, run too lean from the factory. No matter if you have free-flowing exhaust & intake or keep the restrictive exhaust & intake, your bike will run longer, stronger, and more efficiently with a better tune. 

The Power Vision and the FP3 allow you to improve your AFR and Timing tables for a much better running engine.  They also have the ability to adjust out the decel pop if you do not like it.

Additionally, if you are so inclined, the Power Vision and the FP3 have a variety of gauges that you can monitor, in real time, the status of a variety of data points in your engine.  From MPG, to MAP, to Spark Retard, to Engine Temperature, and much more.

The XiED products improve the AFR, resulting in a cooler and smoother/stronger running engine, but don’t touch the timing tables.

Click HERE for an overview of tuning options. 


Gas Tank Lift

PREMIUM 2" TANK LIFT KIT FITS HARLEY-DAVIDSON ALL DYNA MODELS 1999-Up Super Glide, Super Glide Custom, Street Bob, Low Rider, Wide Glide, Fat Bob  DK Custom Products



  • Redirects wind to the top of your engine (helps in cooling)

  • Plus of easier cleaning


Besides making your ride more comfortable, tank lifts also have a cooling aspect. With the tank lifted, the wind is no longer coming over the top of the tank and hitting the rider(reduced wind buffeting) and instead flows under the tank, over the top of the engine, helping to cool your engine down. 



Coil Relocation Kit



  • Unblocks air flow to rear cylinder (helps in cooling)

  • Plus of easier cleaning 


Much like the gas tank lift, relocating your coil helps with cooling. With your coil on the left side of your engine, air flow around the rear cylinder is unblocked, allowing more air flow around the engine which will lower engine temps. An engine with the lowest possible temps (190* at cylinder walls) will come out on top every time!



Oil Filter Relocation



  • Puts your filter in the wind (better cooling)

  • More airflow to engine

  • Plus of mess-free oil changes


Relocating the filter puts it in the wind and allows more airflow to your engine and helps cool the oil. Plus, future oil changes will be a breeze with your oil filter now mounted on the downtube.

Performance Permanent Oil Filters

OUTLAW High Performance Cleanable Oil Filter in Polished Finish Permanent DK Custom Twin Cam Harley-Davidson Softail Dyna Touring Trike Freewheeler High Flow High Performance Superior Filtration Increased HP Torque Engine Cooler Premium



  • Superior Filtration

  • Reduced drag on oil pump

  • Finned Billet Case (little extra cooling)


Permanent oil filters offer many performance increasing features. With their high flow rates, magnetic pre-filtering, consistent filtering medium, billet outer housing which aids in cooling, and, unlike standard paper filters, a progressive rate bypass which avoids unfiltered oil bypassing the filter at startup and high RPM operation. The combination of these characteristics, dyno runs consistently show an increase in Horsepower and in Torque! 

Oil Coolers

Deluxe Oil Cooler System for Harley-Davidson Motorcycles DK Custom High Flow Performance Sportster  Dyna Softail Touring Trike Freewheeler Big Twin Evo Milwaukee Eight Cooler Running Motor Jagg HD


It’s a given; oil coolers help cool down the oil and cooler oil/engine means better performance. No matter which oil you run, oil is the lifeblood of your engine and is subjected to intense heat.  It is crucial to performance and engine longevity to cool that oil down. If you have an air cooled twin cam with no factory oil cooler, you can get a side mount(downtube) or a low mount and typically see a 20-40* drop in temps. Using the Secondary/Auxiliary Oil Cooler with its patent-pending cooling bracket (see full details HERE), you can get an even larger drop in temps. Having the lowest possible engine and oil temps (down to 190* at cylinder walls) will result in the Ultimate Performance!

Click this LINK to read how much cylinder wall temperatures affect Performance.


Why Do We Use & Recommend Jagg Oil Coolers?

HyperFlow Technology is the engineered balance between performance and flow. It should first be described as a "systems" way of thinking.

Air flow, fins, oil flow, turbulators, brazing technology, metal finish, oil filter adapter design, thermostatic actuator, etc., are each components maximized to contribute to the overall system. It is only when each individual component is considered in relation to its contribution to the whole that a true systems approach can be claimed.



Choose any combination of the above mods equalling $400 or more total

and use Coupon Code:


in checkout to SAVE $20 On Your Order!