DK Custom Products

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ViED Fuel Enrichment for Harley EFI Plug-n-Play..More Details

Availability: In stock
Item #: DK-VIED-NR
Manufacturer: DK Custom Products

Plug-n-Play Fuel Enrichment for Fuel Injected Harley-Davidsons ViED Lowers Engine & Exhaust Temps - Improves Throttle Response For Touring baggers dyna sportsters softail v-rod DK Custom Nightrider

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Dynamic Tuning For Harley-Davidson Motorcycles
Variable Inline Enrichment Device


Cost Effective Alternative to an Aftermarket Tuner & Dyno Runs.

This Patented Device Dynamically Adjusts to Changes Made to Your Bike!

ViED's will Cool Your Bike Down & Make it Run Better!


The Plug-n-Play ViED richens the Air Fuel Ratio from14.6:1 to a range of 14.3-13.9:1 in closed loop mode.  

This Variable Fuel management upgrade allows you to fine-tune the air fuel mixture with a small screwdriver.

Immediate Benefits:

  • Lower Engine Temperature
  • Lower Exhaust Temperature
  • Improved Throttle Response
  • Reduced Surging
  • Reduced Pinging




  • Touring  2007-2009
  • Softail  2007-2011
  • Dyna  2006-2011
  • Sportster  2007-2013
  • V-Rod 2007-2011

 Recommended for: Stock Bikes, & Stage I Bikes (High Flow Intake & Exhaust) Will NOT Work with Stage II, III, or IV.


Simple install-comes with instructions.  No tools required, installs in a few minutes.

They work inline with the stock H-D narrow band 02 sensors and Delphi ECM to richen the fuel mixtures, adding up to 6% more fuel to the engine in closed loop mode.

There is an indirect richening of the open loop fuel mixtures through the learning mode, or adaptive fuel value action built into your ECM.  This ensures the richer 13.8-12.5:1 AFR's are ALSO adjusted in heavy/full throttle operation.


LINK to All Dynamic Tuners

Finally my bike is running right. Surging is gone, heat is way down. -Jason


"409” ignition wires provide continuous heat protection up to 600-degrees Fahrenheit

Customer Reviews

very pleased Review by Hangman
I'm very pleased with the product and the service I received. I have and will continue to recommend this product (Posted on 8/8/2021)
10 stars Review by Old fat bob man
I love the products I have purchased from these dudes. My wires that I nicknamed liar wires are working as advertised. The catch can is beautiful and works awesome. My external breather system has made a difference in my bike as well. I recommend these cats for your performance upgrades for sure. Keep rocking the cool stuff DK customs. (Posted on 7/7/2021)
Gr8 stuff,Gr8 peeps Review by Rawg
I have dealt with DK custom for many years. I have a lot of their products on my bike.
It is refreshing to deal with a company that knows what they’re doing and why.
Also top-notch customer service.
Keep up the good work (Posted on 6/28/2021)
Awesome product Review by Dave
Not looking for a high HP speed machine. Pipes, air cleaner, and stage one time on a 07 Fxstc. Bike was not smooth for low speed/rpm cruising. I was even thinking of gearing it down. Put the vied on and the change was instant. No more low speed chugging and had a good amount of low end pull that it never had. It is like a whole new bike! So just ordered a second one for another bike! Awesome product without spending a ton of money. Also the bike runs 50 to 60 degrees cooler on the head temps. Added bonus. (Posted on 6/9/2021)
More responsive Review by TALLELF
No dyno done.. but i can tell with these and my 828 air filter the lag and flatspot on the low end is gone.
It's at the recommended 50% for a sportster with stock exhaust. May tone it back a notch since it's not free flowing but feels better and more responsive (Posted on 3/22/2021)
Great Review by Festus
I can tell from response on 50% setting a vast improvement. On my second tank of fuel and ready to try next setting. No problems with codes (Posted on 8/8/2019)
Works great Review by Kbetts
I was concerned about engine heat and running 87 Octane in my 2008 Sportster 1200C when premium wasn't available (happened last month). I had a stumble at neutral throttle positions as well. I don't want to tune my bike, I just want it to run well (and cool). The ViED are simple to install and they are effective at getting rid of stumble, decell pop, and lowering engine temperature. I'm sure they aren't a cure for the EPA mandated factory lean condition, but they help a lot and are affordable. DK Customs provided fast service and good prices. Thanks, guys. Safe riding. (Posted on 5/30/2019)
fantastic Review by wayne
great product and even better service ...we installed this on a 2008 FLHTC and customer is VERY happy ...cheers from AREA 51 customs in Canada
(Posted on 5/23/2019)
Nice product Review by Jim
I installed a set of these on an 09 dyna with open intake and exhaust. Product performs as advertised. It richened the fuel/air mix and my bike runs cooler and stronger with overall better performance. I feel certain a real tuner could do better but not for the price. Most inexpensive, legitimate way get more fuel when running an open intake and exhaust! (Posted on 8/17/2018)

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