Spool IFX350 Upgraded DI Injectors +30% [S58]

Spool IFX350 Upgraded DI Injectors +30% [S58]

The Spool IFX direct injectors provide approximately 30% more flow than the factory injectors. They are intended for builds where the original injectors run out of capacity at high load and RPM while smooth idle and low-load behaviour remain important.

The extra fuel is delivered through the factory direct-injection system. Correct calibration changes are mandatory before running the engine with these injectors.

What the upgrade adds

• Approximately 30% more flow than the factory injectors
• Designed to retain smooth idle and low-load behaviour
• Suitable for gasoline and ethanol-based fuels
• Supplied as a flow-matched injector set
• Manufacturer-rated operation up to 390 bar

Injector size, high-pressure pump flow, in-tank pump capacity and calibration must be planned as one system so fuel delivery remains controlled across the full RPM range.

Example vehicle fitment

• BMW M3 (S58) – vm. 2021–2026
• BMW M4 (S58) – vm. 2021–2026

Always confirm the engine, chassis, model year and part-specific fitment before ordering. Not every version within a model range necessarily uses the same part.