Know your exact ethanol content in real-time via the Fuel-it! or JB4 app on your smartphone or tablet.
Fuel-It! Glass Ethanol Content Tester
Fuel-It! Universal Bluetooth Flex-Fuel Kit
Fuel-It! Bluetooth FLEX FUEL KIT for 2022+ Subaru WRX
Fuel-It! FLEX FUEL KIT for the B48/B58 Toyota Supra MK5
Fuel-It! Bluetooth FLEX FUEL KIT for 2022+ Toyota Tundra, 2022+ Toyota Land Cruiser, & 2023+ Toyota Sequoia 3.5L
Fuel-It! Bluetooth FLEX FUEL KIT for the S63TU 2012-2016 F10 BMW M5 & 2012-2019 F12/F13 M6
Fuel-It! FLEX FUEL KIT for S58 BMW G80 M3 & G82 G83 M4
Fuel-It! FLEX FUEL KIT for S58 BMW X3M & X4M
Fuel-It! Bluetooth FLEX FUEL KITS for E CHASSIS BMWs
Fuel-It! Bluetooth FLEX FUEL KIT for the B58 BMW M240i, M340i, & M440i
Fuel-It! Bluetooth FLEX FUEL KIT for the B46/B48 BMW 230i, 330i, & 430i
Fuel-It! Bluetooth FLEX FUEL KIT for BMW F CHASSIS B38, B46, B48, B58 Motors
