The latest in digital communication with your bike's fuel injection system is done via bluetooth with your smartphone, either Android or iPhone.

Used to recalibrate the OEM fuel map with flash technology.
The OEM fuel map will be stored in the FP4 so the ECU can always be returned to OEM factory condition.

The FP4 features an all-new circuit board, case, firmware, and app, all designed and manufactured in Santa Fe Springs, CA.
The new hardware is slimmer and smaller than the previous generation’s electronics for installation in even in even tighter places. The slightly longer wiring harness will allow more installation options.

The LEDs on the unit are simplified for a more intuitive understanding of the actions between the Vance & Hines FP4 and your bike.
The new Vance & Hines FP4 App is easier to use and faster than ever before.

The new rider interface makes navigating the app a breeze and the new navigation bar allows you to access the Main Menu, Live Sensor Data, System Info, and Customer Support Menus from anywhere within the FP4 App.
The Live Data screen has also been reworked with a new look and an extra gauge, so you can see more data.

The all-new Performance Log feature brings another level of control and insight. Select from three data logging settings to control how long you want to record, go for a ride, then dig into your data with the ride-activated chart.
From the chart, you can pinch-zoom in on your data, select a point, and look at any available sensor’s values from your ride.
This exciting new tool can be used for everything from diagnostic purposes to creating dyno charts.

The Performance Data feature will also use your phone’s onboard GPS to map out and record that same ride, allowing you to see just how long that route took you to complete, your 0-60 time on that one stretch of road, or how fast you took that hairpin turn.
The same level of detail and expertise went into creating new maps for the 2021 Harley-Davidson Touring and Softail models.

Riders will be able to select from a vast library of Vance & Hines maps, made for their specific model, with real parts on real bikes, in their Santa Fe Springs, CA dyno-tuning facility.
Riders will be able to further modify and develop those maps through a number of customization options found in the Vance & Hines FP4 App. - New FP4 hardware is smaller and thinner than the previous generation FuelPak - The unit’s LEDs have been simplified so you know exactly what’s going on between the FP4 and your motorcycle - Built from the ground up Android and iPhone apps feature a new rider interface and are easier to navigate and use than ever before - Live Data in the FP4 App has been upgraded with a whole new look, and an additional gauge to track more crucial data while you ride - All new Performance Data feature allows you to record your ride, look at all available sensors in the created chart, and see a map of your ride recorded with your phone’s onboard GPS.

Note: Once the FP4 is used on a bike it is 'mated' to that specific OEM ECU.
You will not be able to use the same FP4 on another bike.
The OEM fuel map is stored in the FP4, therefore the ECU can always be returned to the OEM factory set-up.

Note: The FuelPak FP4 allows you to disable the 2nd. O2 sensor, without triggering trouble codes.
This will enable you to use exhaust mufflers of earlier models that are not equipped with an O2 sensor connection.

Supplier Code: 66045

Fits: > 11-20 Softail (excl. 11-13 & 16-20 CVO);
12-17 Dyna (excl. 12-13 CVO);
14-20 Touring/CVO;
16-20 Freewheeler;
14-20 XL Sportster;
15-20 Street XG500/750/750A

IMPORTANT NOTICE – D-Star Racewear and Customs / Messrs Johnson accept no responsibility for any mechanical issues that your vehicle whilst using a custom exhaust.
With the correct fitment and fuel tuning (if you have an fp3 please see the product info for setup) these will operate to perfect conditions.
any issues with setup, you can utilise V&H excellent customer service who will help amend and tweak maps for any custom exhaust along with their own V&H off the shelf setups.

It is your responsibility to ensure your bike is road legal at all times and all parts meet local laws.
Vehicles should be have all parts and bolts checked after the first 50 miles of use, then every 100-150 miles after to ensure everything is fastened correctly and in good operational order.