Spool Performance - IFX350 Upgraded DI Injectors || S58

Spool Performance IFX-350 High-Flow DI Injectors – S58 Platform

Power. Precision. Control.
Introducing the Spool Performance IFX-350 Direct Injection (DI) Injectors — the most advanced fuel injector upgrade for the BMW S58 engine platform. Engineered for high-output builds, these injectors are the ideal match for performance enthusiasts demanding more power without compromising factory drivability.

🔬 Purpose-Built for Big Power with OEM-Like Manners

The IFX-350 injectors offer an impressive +30% increase in flow over OEM while retaining full factory ECU control. Designed for direct injection-only tuning strategies, they maintain a smooth idle and stock-like low-load behavior, even in extreme performance conditions.

Perfect for four-digit horsepower goals, the IFX-350s are fully compatible with Spool’s FX-350 HPFP and deliver consistent performance at fuel pressures up to 390 bar (39 MPa / 5600 psi).

🛠️ Key Specifications:

• 💧 +30% Flow Increase vs OEM injectors

• 🚀 390 Bar Compatible – Max pressure fueling performance

• 🧬 Enhanced Atomization – Ensures efficient, clean combustion

• ⚙️ Factory ECU Integration – No drivability compromises

• 🧩 Direct Plug-and-Play Fitment – For all S58-equipped BMWs

• 🔧 Tuning Required – Full calibration support available

📦 Vehicle Compatibility:

• BMW G87 M2

• BMW G80 M3 / G82 M4

• BMW F97 X3M / F98 X4M
  (S58 Gen2 direct injection platform)

Whether you’re building a record-breaking street car or a reliable track weapon, the IFX-350s are your answer to high-flow fueling without additional port injection or meth systems.

🛡️ Warranty & Support:

• ✅ 1-Year Manufacturer Warranty

• 🧠 Calibration Support for Tuners Available

• 💬 Customer Loyalty Program – Previous FX-350 HPFP buyers get 15% off. Just provide your order number for an exclusive discount code.

🧰 Perfect Pairing:

• FX-350 High-Pressure Fuel Pumps – Designed to handle the same 390 bar system pressure and maximize flow.

• Spool Stage 3 LPFP Kit – To avoid fuel starvation and ensure proper supply to the high-pressure system.

💡 Why Choose IFX-350?

• Designed for S58-specific flow and combustion dynamics

• Trusted by tuners aiming for 1000+ WHP on DI-only setups

• Ideal upgrade when switching to full E85 or high-boost builds