Last updated: November 23, 2020

Best Tuner for Harley 103

Your guide to this review today is by product expert Dencan Brain
Published 2:02 am

Harley Davidson is the king of producing top-notch bikes. All the Harley lovers, including me, love the 103 cubic inches beast engine. It’s not a great mystery that having the Best tuner for Harley 103 will increase the engine performance vastly, and the proper tuning will save fuel as well.

In the Harley tuner reviews, I will walk you into all the features of Harley tuner kits and their pros cons. I am confident that you will find the information useful and can choose the best Harley tuner comfortably.

5 Best Tuner for Harley 103 in 2021

  1. Vance & Hines Fuelpak FP3 – 66005
  2. Vance & Hines Fuelpak FP3 Tuner
  3. Vance & Hines FP3 Fuel Pak 66007
  4. Vance And Hines Fuelpak Led 2002-2007
  5. Dynojet Black Power Vision Tuner PV-2B
First, Let’s have a look at the Harley Davidson tuner comparison chart below.

Quick Comparison: 5 Best Tuner for Harley 103 in 2021


Product Name



  • Diagnose Trouble Codes: Efficiently
  • Storage: Moderate
  • Warranty: 1-year
  • Compatible Smartphone: Both iPhone and Android
  • Storage: High
  • Warranty: 1-year


  • Storage: High
  • Warranty: 1-year
  • Software: Flash technology
  • Mapping: More than 7 thousands
  • Tunings: 4 different settings
  • MPG: increases
  • Weight: Lightweight
  • Installation: Very easy
  • Warranty: 1-year
  • Diagnose Trouble Codes: Efficiently
  • Storage: 2GB 
  • Warranty: 1-year
  • Display: Built-in 3.5 inch touch screen

5 Best Tuner for Harley 103 Review

Are you looking to improve your bike overall performance including saving the fuel? Then, Vance & Hines Fuelpak FP3 – 66005 will be the right one for you. It gives you a smooth shift and better ignition performance than ever.

Though it doesn’t come with an external display, you can use your smartphone as a monitoring display anyway. You can keep track of all the information such as fuel economy, engine temperature, battery voltage, gear information and so on. Moreover, you can even recalibrate your engine performance without any hassle with this best auto tuner for Harley Davidson.

Benefits and Reasons to buy

  • No annoyance installing the tuner on your Harley-Davidson Bike. It is a very much straight-forward process and just needs a few minutes to install it.
  • Flash tuning allows you to recalibrate the engine. It will ensure the top-notch performance through your road trip.
  • Top of everything, you can use your smartphone to get all the information such as RPM, battery voltage, gear information and so on. Doesn’t matter what sort of smartphone user you are, android or Iphone, it will work on both.
  • It has an auto tuning feature to make your journey smooth and perfect more than ever.

Descriptions and Features

Display design: It doesn’t have any display of its own. However, you can use your smartphone as a display. You just need to install an app and pair with the tuner. You can monitor all the parameters once your phone is connected with the tuner.

Installation: Installing the Vance & Hines Fuelpak FP3 – 66005 is easy as ABC. You could install it with your eyes shut! You can download the installation manual or watch youtube videos if you’re a newbie tuner user.

Vehicle Performance: Your harley-Davidson will get the top-notch efficiency once you install the tuner. This best efi tuner for harley davidson will increase your bike’s ignition performance vastly.

Fuel saving: There are some users who install tuners to only get the better MPG. Well, if it’s the case, then I would suggest you to think about this one as it gives the maximum fuel economy and improves the highest level of MPG.

Unit Size: It weighs only 6.4 ounces and is 5.2 x 5 x 1.7 inches is dimension and therefore easy to carry and install.

Wired or Wireless? It’s absolutely wireless. You can easily connect your mobile device via bluetooth and monitor everything on your Harley-Davidson.

Software: Like all other Vance & Hines models, Fuelpak FP3- 66005 model also uses flash technology for the tuner. The best tuner for Harley davidson helps to enhance your bike’s performance efficiently.

Connection with Mobile device: You can easily connect your mobile phone with tuner. You don’t need any additional accessories to connect. Your built-in bluetooth will do the job for you to pair themselves both.

The State Emission Laws: Unfortunately, it’s not CARB certified, meaning, if you’re living in California, you are not authorized to use this tuner.

Auto Tune Method: It has a built-in auto tuning method. You can set this tuning if you’re unsure about setting up a manual tuning. Hence, it is not that tough to set the right Harley Davidson tuning.

Diagnostic Trouble Codes: The tuner has the ability to diagnose the trouble codes. So it will be easier for you to maintain your bike’s efficiency.

Warranty: You will get 1-year manufacturer warranty. Therefore, almost no users need it as it provides efficient performance for years.

Compatibility and Adjustments: It fits a wide range of Harley-Davidson bikes. Let’s have a look at what it is compatible with.

  • Touring FLH/FLT: 2014-2020,
  • Dyna FXD: 2012-2017
  • Softail FXST/FLST: 2011-2020
  • Street XG: 2014-2020
  • Sportster XL: 2014-2020

Key features:

  • Data: Live sensor data
  • Upgrade: Expansive library for upgrade
  • Technology: Flash technology
  • Fuel: Saves fuel
  • Compatible with a wide range of Harley-Davidson models.
  • Flash tuning allows you to recalibrate the engine.
  • Real-time tracking with both Android or iOS.
  • Auto tune feature for efficient performance.
  • You can’t use the tuner in multiple bikes.

Vance & Hines Fuelpak FP3 Fuel Management Performance Tuner is the full package you need to ride flawlessly with your Harley-Davidson. It uses HD-LAN to make progress efficiently. This best Harley tuner‘s unique feature is you can connect the tuner with your smartphone, no matter iPhone or android. It will work with both.

Vance and Hines use Flash technology to make it easier for you to keep tracking all the parameters in real-time without making any errors. Moreover, you can save a considerable amount of your fuel with the right tuning options for your Harley-Davidson. The auto-tuning feature is also something you would need when you’re in a hurry to manually set Harley tuners up.

Benefits and Reasons to buy:

  • Vance & Hines Fuelpak FP3 Fuel Management is a user friendly tuner because it could transfer a huge amount of data within the fastest time.
  • The manufacturer provides support whenever you need. You can either call them or chat online any moment you want.
  • Easy installation is another specialty for the newbie rider. You wouldn’t stretch it out while installing.
  • You will have access to the utilized library where you can get tons of dyno-tuned maps.
  • You can use your smartphone as a display of Harley Davidson tuners to get all the information in real time. And the connection is wireless.

Descriptions and Features

Display design: The Harley Davidson tuners EFI doesn’t have any additional display to monitor the data. But what’s great about the tuner is that you can connect your smartphone and use the mobile display to get all the real-time data conveniently.

Installation: You can easily install the tuner without any hassle. Moreover you will get full support from the manufacturer in the time of installation.

Vehicle Performance: It  will save your fuel and therefore improve your fuel mileage simultaneously. Moreover, you will have the best ignition performance more than ever.

Unit Size and Connectivity: It is only 5 x 3 x 2 inches in dimension and therefore very much handy. It weighs not more than 5 ounces. So, it won’t be very difficult to carry or install.

Wired or Wireless? It is 100% wireless. Just connect the tuner with LAN port and you can remotely see all the data via bluetooth connection.

Fuel saving: One of the major purposes to have a tuner for your Harley-Davidson is to save fuel efficiently. And the Harley Davidson fuel management system does the job greatly with a motorcycle auto tuner. You can save your fuel 5-10% with the right tuning.

Software: Vance and Hines uses flash technology that has not a micro chance to get a crash. Besides, it will provide sufficient performance for several years.

Compatibility and Adjustments: It is compatible with a wide range of Harley-Davidson and other motorcycle models. Here is the list for your convenience of choosing the right one.

  • Harley-Davidson: 2014-2019
  • Electra Glides, Road Glides, Road Kings & Street Glides: 2014-1019
  • Sportsters: 2014-2019
  • Softails: 2012-2017
  • Trikes: 2011-2019
  • Dynas: 2014-2019

Connection with Mobile device: The Harley EFI tuner functions to connect with any smartphone in the world. You would just need to install an app on your mobile phone and pair the tuner with the Mobile via Bluetooth.

The State Emission Laws: If you are residing in California then you’re somewhat unlucky. Because you can’t use the tuner in your state.

Auto Tune Method: Auto tuning is needed when you’re in a hurry and confused to make sure what tuning you would need. Here, the tuner will help you to go avoid this part. You can set the tuner in auto mode and the rest will do by itself.

Diagnostic Trouble Codes: You will get the info if your motorcycle isn’t doing well. Therefore, you can fix it by yourself or by the help of any experts.

Warranty: Forget about warranty when you are installing any of vance and hines products. You will get effective performance for the years. However, you will get a full year limited warranty.

Key features:

  • Data: Real-time data
  • Connection: Connect with Smartphone
  • Installation: Easy installation
  • Fuel Saving: Saves fuel.
  • You can tune the bike without stopping it
  • 1-year warranty gives the peace of mind
  • Connects wirelessly with smartphones
  • Auto-Tune feature for convenient tuning
  • You can modify bike calibration easily
  • Comparatively pricier than other brands.

FP3 FuelPak 66007 is another top-notch tuner from Vance & Hines. It is outstandingly famous for its fuel management and improved performance than its predecessor models. It provides extensive mapping for the exhaust system and therefore you will get 7k+ Maps on your ride.

It has 4 different tuning options that are something extraordinary than other models. Moreover, you will get excellent throttle response with the auto tuning feature. And top of that, FP3 FuelPak 66007 has the loftiest ability to read and diagnose trouble codes.

Benefits and Reasons to buy

  • This top-tier Harley auto tuner can calibrate the engine with the leading flash technology. Therefore, you will get more extraordinary performance from your beast bike.
  • Connecting wirelessly with your iOS or Android with the help of bluetooth. So you wouldn’t need additional accessories to monitor the data.
  • You can easily upgrade this Harley fuel management tuner using the dedicated tuning library.
  • The tuner has the world’s largest exhaust mapping system available with more than 7000+ maps.
  • 4 different tuning options provide excellent throttle response and utmost performance.

Descriptions and Features

Display design: Like all other Vance and Hines tuners, it doesn’t have any display of its own. However, you have the option to use your Smartphone as a display and controlling system for the Harley fuel tuner. You just need to download an app and pair with the tuner.

Installation: For a newbie, installing anything is like a nightmare. Nevertheless, the FP3 FuelPak 66007 installation is as easy as pie. You wouldn’t need to hassle installing it.

Vehicle Performance: It is one of the best Harley auto tuners that will increase your bike’s throttle response and improve the ignition performance.

Fuel saving: Saving your fuel is the ultimate promise of this tuner. You can save more than 10% fuel by installing it. Therefore, it has the best fuel management system for Harley Davidson.

Unit Size and Connectivity: It is very handy to carry. Any newbie can carry and install it without any hassle.

Wired or Wireless? The tuner is totally wireless. It can be connected via your mobile phone’s Bluetooth. Doesn’t matter either you’re an android or smartphone user, it will work on both.

Software: The tuner is widely known for its bug-free software. It uses Flash technology for better performance that is developed by their own software developer.

Throttle Response: 4 different settings make the tuner exclusive in the market. Therefore, the stock settings improve throttle response greatly.

Compatibility and Adjustments: It is compatible with the models listed below.

  • Touring FLH/FLT: 2007-2013,
  • Dyna FXD: 2007-2011
  • Softail FXST/FLST: 2007-2010
  • Street XG: 2014-2020
  • Sportster XL: 2007-2013

Connection with Mobile devices: Connecting with any sort of smartphone is compatible with this model. Downloading an app from an app store or play store will do the job for you.

The State Emission Laws: You can use the tuner all over the US except California. CARB doesn’t give the permission to ship the product in that particular state.

Auto Tune Method: Auto tuning increases performance vastly without buying any additional tools. It adjusts air intake and exhaust to tune swiftly. Therefore, the Harley Davidson auto tuner system is unique compared to other models.

Diagnostic Trouble Codes: Reading and diagnosing trouble codes is as easy as pie with the FP3 FuelPak 66007.

Storage Capabilities: It has more than 7 thousands maps in its storage. So, riding with Harley-Davidson would be easier than ever.

Warranty: 1-year warranty gives you the peace of mind. Therefore, you wouldn’t complain for years as it runs smoothly for so long.

Key features:

  • Mapping: More than 7 thousands
  • Software: Flash technology
  • Connection: Wireless
  • Tuning Types: 4 different settings
  • 4 different tuning options
  • Diagnose trouble codes easily
  • Auto tuning option for additional performance
  • Saves huge amount of fuel
  • More than 7 thousands map available for exhaust system
  • Not CARB certified.
  • It can’t read fuel economy, odometer and gear.

Vance and Hines Fuelpak 61003a is an upgraded model from the Vance and Hines brand. This metal-made tuner is best for the touring model Harley-Davidson that was manufactured from 2002-2007. Optimizing your bike’s performance is minutes away with the tuner.

You would never regret installing the tuner as it will save more than your 10% fuel with the right tuning. And the installation process is also very simple. Even a beginner rider can install this one of the best tuners for Harley Davidson bikes without any professional help.

Benefits and Reasons to buy

  • The extraordinary fuel management system will save more than 10% of your bike’s fuel. Therefore it will increase your MPG level.
  • Both Android and i-OS operating systems are supported by the tuner for monitoring purposes.
  • The tuner will improve your ignition performance and therefore increase the throttle response.
  • The installation process is as easy as you can install the tuner with your eyes shut!
  • 1 year of warranty is provided by the manufacturer. You can claim a free service if any issues occur during the period.

Descriptions and Features

Display design: You might wonder how good the tuner, as it is, doesn’t come with an additional display. But, it makes the tuner handy and less weighty. However, you can monitor all the parameters using your Smartphone.

Installation: Installing a new tool is always stressful. There are always frustrations of making mistakes. But with this tuner, you wouldn’t have a hard time on it. Any beginner can install the tuner without any prior knowledge.

Vehicle Performance: After installing the fuel tuners for Harley Davidson, your bike will be like a great beast! It will improve your bike’s throttle response and ignition performance. If you’re willing to keep your bike’s motor cool then it would be the perfect fit for you.

Fuel saving: Excellent fuel management will save you a fortune. From the personal experience of some expert bikers, it could be said that the tuner saves more than 10% fuel of Harley-Davidson.

Unit Size and Connectivity: It is 12 * 4 * 12 inches in dimension and weighs only 1.1 lbs. Therefore, it is very easy to carry and install.

Wired or Wireless? Users can get the real-time data of the bike using the Smartphone via Bluetooth. Therefore, it doesn’t need to put any extra cables.

Software: Flash technology is something extraordinary developed by the Developer team. There is no chance of getting an app crashes or mistaken parameters.

Compatibility and Adjustments: It is compatible with 2002-2007 models Harley Davidson.

The State Emission Laws: As it isn’t certified by CARB, anyone who is living in California, unfortunately, can’t use the tuner.

Auto Tune Method: Autotune mode is responsible to save your fuel and increase the fuel economy.

Diagnostic Trouble Codes: It has upgraded technology to read and eliminate trouble codes. It is significantly better than any other tuner.

Storage Capabilities: You can download more than 7 thousand maps in the tuner. You can automatically download any map or can get manual mapping by calling the manufacturer.

Warranty: You will receive a 1-year warranty for the tuner. If you feel anything fishy, you can send the tuner for repair or take a look if it’s okay.

Key features:

  • MPG: increases
  • Weight: Lightweight
  • Installation: very easy
  • Warranty: 1-year
  • Improves ignition performance
  • Saves fuel mileage
  • Improves throttle response
  • Auto tuning method for extreme performance building.
  • Doesn’t certify by CARB

Here is the last one Dynojet black Power Vision Tuner Pv-2B, for you that is totally different from all the mentioned above. It has a display of its own and you can control easily. 6 different tunings give you the ultimate power to enhance your Harley-Davidson.

The tuner has the big storage facilities where you can download and save stock calibration. Weather resistance is another specialty of the tuner, as well as it is shock resistant. Moreover, you will get a full year warranty from the manufacturer.

Benefits and Reasons to buy

  • Reading and diagnosing error codes is easier than ever with its live diagnostic feature.
  • It is weather resistant, so if you want to have a ride while heavy rain , the tuner won’t mind!
  • Built-in 3.5’’ display gives the pleasure to monitor without having hassle of connection with mobile devices.
  • 2 GB built-in memory ensures the maximum tunings to keep for your convenience.
  • It is designed with Power core software to ensure the maximum performance while on the fly.

Descriptions and Features

Display design: It has a 3.5″ LED Touch Screen display so that you wouldn’t need to waste your valuable time by pairing with mobile phones to monitor your bike’s data. You can simply watch all the parameters using the built-in display. So monitoring the datas is now a piece of cake.

Installation: Installation process might be a little tricky for the beginners, but once anyone gets the installation manual, they can effortlessly install the tuner within the shortest time.

Vehicle Performance: It has 6 different tunings for different types of riders. If you are an economy rider then you have plenty of tuning settings to save your fuel. Or if you’re a hardcore rider then you have so many tunings for better performance and hardcore ride. Moreover, it will increase the ignition performance and reduce the throttle response time.

Fuel saving: As I mentioned earlier, the motorcycle tuners will save a huge amount of fuel if you are willing to. Just set the tune in economy mode and see the difference yourself! All the expert riders say that they are saving more than 10% fuel after installing it. It is a significant difference for any economy bike rider.

Unit Size and Connectivity: It weighs only 1.1lbs along with the monitor and is 1 x 1 x 1 inches in dimension that is consideringly lightweight comparatively in the market. Moreover, Silicone elastomer is totally weather and shock resistant. Hence, the 8-pin connection is a bit destructive for a beginner user.

Wired or Wireless? Unfortunately, if you’re looking for a wireless tuner then it will disappoint you. It is not a wireless tuner, but works directly with cables.

Software: PowerCore Software is dedicatedly made by the world’s expert team. It guarantees crash-free smooth performance for many years.

Compatibility and Adjustments: It is compatible with a wide range of Harley-Davidson  models. To check all the compatible models, please check the list here. ( )

Connection with Mobile device: This best tuner couldn’t connect with mobile devices. Therefore, you don’t even need to create a connection with your mobile device to get all the parameters data. You can easily get all the information from the built-in display.

The State Emission Laws: You can use the tuner in any state in America other than California. Because CARb doesn’t allow this type of product to be shipped in the area.

Auto Tune Method: Auto tuning is a magical tuning option for all the riders, specially for beginners. It will provide top performance whatever style you like or follow to your riding journey.

Diagnostic Trouble Codes: You can easily get real time alert for every error code and therefore could fix the error code with the help of DynoJet tuner.

Storage Capabilities: For better storage performance, it comes with 2GB built-in memory to keep a wide range of tunings and maps. No other tuner can offer such features. This is special from the Dynojet for its valuable users.

Warranty: However, once you install the tuner in your harley, the manufacturer doesn’t allow users to ship it back. However, users will get a 1 year warranty without any prior cost. Though, nobody complains for a long time after even finishing the warranty period.

Key features:

  • Display: Built-in 3.5 inch touch screen
  • Auto Tuning: Yes
  • Storage: 2 GB
  • Warranty: 1 year
  • Efficient trouble codes reading and fixing
  • Tunes are editable with power vision software
  • Easily flash the bike with few clicks
  • Custom tuning using the library or manufacturer email
  • 6 different tuning settings
  • No returns once installed
  • Little bit pricier than other tuners


As you went through my review of the best tuner for Harley 103, you must be now confident to choose one yourself. Just don’t forget to make sure that the Harley tuner fits your desired model.

Still, if you feel confused or want to know any more specific answer, don’t give a second thought and directly ask me in the comment box. I am always ready to be a helping hand for a vehicle enthusiastic.


Dencan Brain

Dencan Brain

I, Dencan Brain BOŽIDAR, call myself a Torque master. I've always been fascinated with cars and tools accessories. You can call me gearheads or petrolheads. I recently started a blog about welding gear.I am also a DIY welding enthusiast because it is affordable for any household work. Follow me on Facebook, Twitter, Instagram, LinkedIn and tumblr.
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