BMW Gen 2 B58 Spool Stage 2 IFX350X Upgraded DI Injectors +60%

The Spool IFX350X Stage 2 upgraded DI injectors are Spool's highest flowing Gen 2 B58 injector, with 60% more flow at high load.

Why you need it

Big turbo and high ethanol builds outgrow the stock direct injectors quickly. The IFX350X is sized for the Gen 2 B58 to keep stock-like idle and low-load manners, then flow 60% more at high load and high rpm. It is rated to flow at up to 390 bar.

Fits

• BMW Gen 2 B58 engines, including the M340i and M440i

Features

• 60% more flow than stock DI injectors
• Flows at up to 390 bar
• Stock-like idle and low-load behavior

Good to know

A supporting tune is required to run these injectors. Spool provides calibration support for existing Gen 2 B58 tuning platforms. For a milder step, see the Stage 1 IFX350 (+30%). Professional installation is recommended.