Spool Performance FX-170 Upgraded High Pressure Fuel Pump [Gen 1 B58]

The Spool Performance FX-170 Upgraded High-Pressure Fuel Pump for Gen 1 B58 engines is an essential upgrade for those looking to maximize their BMW's performance. Designed with a larger bore than the stock pump, the FX-170 delivers 50% more fuel flow, making it ideal for high-power applications such as larger turbos and higher ethanol blends. This high-performance pump is fully E85 compatible and features a plug-and-play design, meaning no cutting or splicing is required for installation. Additionally, the FX-170 operates at 25% higher pressure than stock, allowing your injectors to flow more fuel per injection cycle, optimizing both power and efficiency.

For BMW B58 owners, the FX-170 removes the stock HPFP bottleneck, providing increased fueling capacity and supporting high-boost builds. Whether you are tuning for bigger turbos or higher ethanol blends, the FX-170 ensures your fuel system can handle the demands of high-performance setups.

Why You Need It:

The stock HPFP in the B58 engine is not sufficient for pushing the limits of high-horsepower builds, particularly when running higher ethanol concentrations or upgrading to larger turbos. The FX-170 addresses these limitations by:

• Increasing fuel flow by 50%, providing the necessary fueling for bigger turbos and higher ethanol blends.
• Boosting injector output, allowing your injectors to deliver more fuel without sacrificing performance.
• Raising the fueling limits of the platform, making it ideal for aggressive tuning and track-level performance.

The FX-170 is perfect for enthusiasts looking to run aggressive E85 tunes or larger turbo setups, ensuring that your fueling system keeps up with your power goals.

What’s Included in the Kit?

• 2x FX-170 Upgraded High-Pressure Fuel Pumps
• Upgraded Fuel Lines and Complete Installation Hardware

Optional Add-Ons:

• 1x Ethanol Content Monitor Kit with mobile app support
• 1x Bosch-Spec 10-Micron High-Flow Fuel Filter

Spool 10-Micron Fuel Filter:

Included in the kit is a Bosch-Spec 10-Micron High-Flow Fuel Filter. This high-performance filter offers the best filtration available, preventing any pressure drop in the low-pressure side of the fuel system. It protects your high-pressure pumps and injectors from harmful debris, ensuring long-term reliability and performance.

Ethanol Analyzer:

Ethanol blends can vary significantly in ethanol content, with E85 sometimes containing only 55% ethanol (E55) instead of the full 85%. This uncertainty can be problematic for those running E85 tunes. The Spool Ethanol Content Analyzer kit provides real-time readings of ethanol content, ensuring you know exactly what you're fueling with. This can help avoid potential engine damage due to improper ethanol content.

Ethanol Sensor App:

The Ethanol Analyzer App is a free tool that allows users to check the ethanol content of their fuel with ease. It also includes an Ethanol Mix calculator to ensure the perfect blend every time. Even without the analyzer kit, the app allows you to estimate ethanol content, helping you tune your vehicle for optimal performance.

Are Tune Changes Required?

Yes, calibration changes are required before starting your vehicle with the upgraded FX-170 HPFP installed. It’s essential to apply these changes to avoid potential damage and warranty voidance. Spool Performance provides calibration details for your tuner and can help you connect with experienced tuners who specialize in these pumps. Custom tuning is necessary to optimize the fuel delivery for your specific modifications, ensuring maximum performance and reliability.

Low-Pressure Fuel Pump (LPFP) Upgrade:

Proper low-pressure fueling is critical to the longevity and functionality of your high-pressure pumps and injectors. Insufficient low-pressure fueling can lead to damage to the pump piston and bore due to improper lubrication. This type of damage is detectable and will void warranty coverage. It’s essential to ensure that your low-pressure fuel system is upgraded appropriately to match the increased demands of high-power setups.

Fitment:

The Spool Performance FX-170 Upgraded High-Pressure Fuel Pump kit is compatible with the following BMW models equipped with the Gen 1 B58 engine:

• BMW 240i
• BMW 340i
• BMW 440i
• BMW M240i
• BMW X3
• BMW X4

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.