BM3 Flex Fuel Kit S58

Add true FlexFuel capability to your BMW G8X M2, M3, or M4. This kit pairs a CANBUS Ethanol Content Analyzer (ECA) with your bootmod3 CustomROM for seamless FlexFuel conversion — compatible with BM3 Flex Fuel OTS MultiMaps and custom tunes.

Installs at the factory fuel hat using a custom aluminum sensor adapter with built-in bypass, plus a kink-free Teflon-braided line that connects straight to the OEM fuel feed — no cutting, splicing, or fabrication needed. What normally takes hours on a lift takes minutes at home.

Highlights:

• Plug-and-play, fully reversible install

• CANBUS ECA integrates directly with bootmod3 CustomROM

• Optional 1/8 NPT fuel pressure sensor port (supports CustomROM v2)

Fits: BMW G8X M2/M3/M4 with the S58 engine

Not for sale or use in California on pollution-controlled vehicles per CARB.