The Vance & Hines FP4 brings our legendary fuel tuning and performance to your 2021-2023 Harley-Davidson Touring and Softail models, with all new features, and the ease of use you expect from Vance & Hines.
FP4 is now also available for Touring, Softail, Dyna, Sportster, and Street models from 2007 and up.
With its state-of-the-art Bluetooth enabled app-driven technology, FP4 empowers you to do 100% of your tuning right from the palm of your hand with your mobile device, backed by industry-leading customer support, all while maintaining 49-state emissions compliance and thereby keeping your Harley-Davidson factory warranty intact.
SHIPPING NOTE: Due to state regulations this item cannot be shipped to customers in the state of California.
Joe Cameron –
Wow! No lag, no bumpy throttle, all performance! Easy install too! Highly recommend!
Martin Garnett –
I have a street glide with high output slip-ons and the power headers. The included fp4 map for this configuration is awesome, but I sincerely hope for throttle response adjustment in a future software update.
Grant Petreikis –
The best tuner (and much more) out there today! You can monitor your bike, tune your bike, and tons more…. All at the touch of your phone!
This FP4 puts the power back to your wheel!
Bradley Howard (verified owner) –
Amazing product! I was skeptical at first due to YouTube reviews and TikTok reviews, but I bit the bullet and went for it. Picked up a FP4 for my 2020 Iron 883 and couldn’t be happier. The bike feels and runs great. 10/10 would recommend. The autotune feature is nothing short of awesome!
FP4 made an immediate improvement to my 2016 Ultra Limited. I had a factory installed tune with my Stage 1 which seemed okay until I decatted the header, then there was nothing but popping & backfiring. That is all gone and the bike is more responsive, quieter and even a little bit more fuel efficient.
I am looking forward to an upcoming update to correct some readouts on my ios device.
While waiting for my slip-ons, did a “stock” tune on my stock 21 Heritage 114. Wow! What a difference. Smoothness, power, all on a stock setup. Can’t wait for my Eliminators.
Installed after during the winter with no issues and great performance. While applying the auto tune I was running, I interrupted the upload and locked my ECM. Contacted customer service and they emailed a shipping slip to send the ECM and FP-4 and it was there within two days. A day after delivery the tech assigned contacted me to ask what I was running so he could modify a tune based off of what I was running. The ECM and tuner were delivered the following day (California to North Carolina) and it started right up. Bottom line; great product, better customer service. Extremely satisfied. Thanks Matthew!
William Thompson –
I’m 69 years old and put a vo2 filter and 2 into 1 slip-on with fp4 on my 2014 switchback! Just watching videos made it simple! Thanks for all the information! Now it sounds like a Harley 😉
Kapena F. –
Easy to instal and easy to tune. Installed on my 2009 sportsterxl1200