Add to Cart The item has been added Fuel-It Fuel Lines for G8X S58 BMW M2 | M3 | M4 2021+ This complete flex fuel kit installs in under 30 minutes and reads your exact E85 mixture in the Fuel-It! smartphone app or JB4 app if equipped. Features CNC machined fittings for a quick plug and play installation with nylon sleeved stainless steel... $199.00 Add to Cart The item has been added Compare