Spool Performance FX-350 Upgraded High Pressure Fuel Pumps [S58]

Unlock the full potential of your BMW S58 engine with the Spool Performance FX-350 High Pressure Fuel Pumps — a high-performance solution engineered to meet the extreme fueling demands of modern performance builds. Designed for enthusiasts seeking power, reliability, and consistency, the FX-350 delivers unmatched pressure and volume to support your engine under the most demanding conditions.

Crafted from high-grade stainless steel, the FX-350 fuel pumps feature a high-tolerance piston and bore coated with a diamond-like carbon (DLC) finish to reduce friction and enhance longevity. These fuel pumps operate flawlessly up to 390 bar, significantly outperforming OEM HPFPs in both pressure capability and output volume.

The FX-350 was purpose-built for the dual-pump design found in the BMW S58 engine, making it the ideal choice for performance applications that rely on direct injection. Compatible with E85 fuel as standard, this setup is perfect for maximizing performance on flex-fuel builds without compromising durability or efficiency.

When paired with Spool’s IFX350 Gen2 Direct Injection (DI) injectors, the FX-350 forms a complete solution for fueling on DI-only systems — offering a powerful, plug-and-play combination that eliminates the need for auxiliary port injection in many high-horsepower builds.

Installation is straightforward thanks to the included pump alignment tool, mounting brackets, pre-fitted low-pressure line, adapter harness, and HPFP hardline. The FX-350 kit ensures OEM-like fitment and finish with plug-and-play simplicity, making it a convenient and effective upgrade for demanding builds.

Each FX-350 kit is backed by Spool Performance’s limited lifetime warranty, a commitment to quality and peace of mind. Please note: to ensure optimal performance and to prevent cavitation damage, an upgraded low-pressure fuel pump is strongly recommended. Cavitation damage is not covered under warranty as it is not related to design or manufacturing defects.

Key Features:

• High-pressure capability up to 390 bar for maximum fueling performance

• Precision-engineered DLC-coated piston and bore for superior durability

• Compatible with E85 fuel for high-performance flex-fuel setups

• Designed specifically for BMW S58 dual-pump architecture

• Plug-and-play installation with included hardware and alignment tools

• Ideal for DI-only high-power builds when paired with IFX350 Gen2 injectors

• Backed by Spool Performance’s limited lifetime warranty

Kit Contents:

• 2 x FX-350 High-Pressure Fuel Pumps

• 2 x Custom Mounting Brackets

• 1 x Pump Alignment Tool

• 1 x Triple-Layer Low Pressure Line

• 1 x Plug-and-Play HPFP Adapter Harness

• 1 x Plug-and-Play HPFP Hardline

Fitment:

• BMW G87 M2

• BMW G20 Alpina B3

• BMW F97 X3M

• BMW F98 X4M

• BMW G80 M3

• BMW G82 M4

Note: An upgraded low-pressure fuel pump is strongly recommended to maintain optimal performance and avoid cavitation-related damage.

Elevate your driving experience with the Spool Performance FX-350 and feel the difference that precision fueling can make in your BMW S58-powered vehicle.

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.