Spool Performance IFX150 Upgraded DI Injectors [Gen 1 B46/B48] - SP-INJ-B4846

Unlock the full fueling potential of your Gen 1 BMW B46/B48 engine with the Spool Performance IFX150 Upgraded Direct Injectors—the ultimate solution for high-performance builds that demand more fuel without sacrificing drivability. Engineered to deliver a massive 150% increase in fuel flow over stock injectors, the IFX150 injectors are specifically designed for enthusiasts pushing the limits of their B48-powered vehicles, whether on the street or track.

What sets the IFX150 injectors apart is their intelligent sizing. While they offer substantial flow gains at high RPM and load, they’ve been finely calibrated to maintain near-stock idle and low-load characteristics, ensuring smooth operation in daily driving scenarios. Months of development and real-world testing across a range of B48 applications have resulted in injectors that not only perform but also integrate seamlessly with your vehicle’s ECU—making them a top-tier solution for any serious B46/B48 build.

These injectors are capable of operating up to 290 bar of fuel pressure and are already proven to outflow aftermarket high-pressure fuel pump solutions, including those with high-lift cam lobes. When paired with Spool Performance’s FX200 HPFP, they support the world’s most powerful DI-only B48 build on record—testament to their unmatched performance.

Please note: tuning is required to run these injectors. Spool Performance provides complete calibration support across all major tuning platforms, ensuring smooth integration with your build.

Key Features:

• 150% Flow Over Stock Injectors – Supports significantly higher fuel demands for big-power builds

• Stock-Like Drivability – Maintains stable idle and low-load operation for street-driven vehicles

• Optimized for Gen 1 B46/B48 – Designed specifically for compatibility with first-gen B-series 4-cylinder BMW engines

• Up to 290 Bar Operation – High pressure capability for extreme performance applications

• Calibration Support Included – Full tuning support offered across all major platforms

• Race-Proven Reliability – Powers the world’s fastest DI-only B48 platform

• Custom Injector Sizing Available – Race-only higher flow options available upon request

• Lifetime Warranty – Confidence and coverage for the life of the product

Fitment: 

• Gen 1 B46 Engines

• Gen 1 B48 Engines

Tuning Requirement:
Tune adjustments are required when using these injectors. 

Elevate your B46/B48 BMW’s performance with the Spool Performance IFX150 Injectors—precision-engineered for massive fueling headroom without compromising everyday drivability.

Note: 'New' merchandise may be returned for exchange or refund within 15 days from the date of shipment. 'New' merchandise must be unused and free from installation or mounting damage. Installation or modification of parts waives your right to returns, refunds, or exchanges.