Spool Performance IFX-EA150 Upgraded DI Injectors for B9/B9.5 EA839

Spool Performance IFX-EA150 Upgraded DI Injectors for EA839

In our testing on a B9 S4, with these injectors paired with a TTE850, a customer ran a 9.98 1/4 mile on street tires, full weight! No lightweight wheels with drag radials, no stripped interior, no race seat! Full OEM weight!

Jackal also holds the top 2 fastest 60-130's in the United states for the B9/B9.5 S4 and S5!! both running Spool Injectors and in the 5 second category!!

Unlock the full fueling potential of your EA839 platform with the Spool Performance IFX-EA150 Upgraded Direct Injectors—precision-engineered to support serious power with OEM-like refinement. Delivering 35% more flow and an additional 1,000 psi of maximum rail pressure capability, the IFX-EA150 injectors provide the fueling headroom required for high-boost, high-airflow builds.

Proper fueling headroom, at a proper price!

These fit both the EA839 3.0T and 2.9TT!!

    Once boost, airflow, or ethanol content increase, the factory EA839 injectors quickly become the limiting factor. High-RPM pulse-width extensions, late injection events, and cylinder-to-cylinder imbalance can all show up when the DI system is pushed beyond its design.

The IFX-EA150 injectors eliminate these constraints by offering:

• 35% Increased Flow Capacity
  More fuel mass per event with reduced pulse-width at high RPM.

• +1,000 psi Additional Pressure Capability
  Stronger atomization and improved combustion consistency even under extreme cylinder pressures.

• Shorter Injection Window
  Meets fueling targets earlier in the cycle for cleaner, more complete combustion.

Performance Advantages

• Supports higher boost and more aggressive ignition timing

• Stabilizes fueling at high RPM where stock injectors fall short

• Enables safe power on ethanol blends, including E50–E85, without running the DI system at its limits

• Prevents lean-out, late-cycle injection, and uneven fuel distribution

• Ideal for big turbo and hybrid turbo EA839 builds

Optimized for E85 and High Ethanol Content

Ethanol requires ~30% more volume than pump gas to achieve the same energy output. This places enormous strain on the stock DI injectors and HPFP. The IFX-EA150 injectors provide the additional flow and pressure needed to run E85 or high-ethanol blends confidently and safely.

With the added flow capacity and increased pressure ceiling, the injectors maintain:

• Consistent lambda under high load

• Safe injector pulse-width at redline

• Stable spray pattern and atomization even with ethanol’s higher volume demand

Testing done at Jackal Motorsports as shown. Excellent gains over RS injectors