Our ‘base’ 4″ to 8″ is a harness is the base of a modular harness system that can be used on many vehicle when paired with our other harnesses, sold as combinations on our site. By itself, this harness can be used to upgrade a number of vehicles, like the C-MAX, Kuga, Escape, B-MAX, Fiesta, Transit, Transit Connect, and more.

We also offer FREE programming files with your purchase, something no other online store does. This allows you to get up and running quickly using an OBDII dongle, without messing around with a bunch of settings or hex codes in FORScan.

Please feel free to check out our Guides tab for more information on what other hardware you’ll need to complete your upgrade.

We pride ourselves in providing the most value out of any online store when it comes to Sync 3 Upgrades. NaviUpgrade is constantly working on building out resources for our customers and fans to use on their own vehicles. Our goal is to empower all vehicle owners to feel comfortable upgrading their own vehicles.