BMW Gen 2 B58 Spool FX-350 High Pressure Fuel Pump

The Spool FX-350 high pressure fuel pump for the BMW Gen 2 B58 delivers fuel at 350 bar (5000 psi) with the same volume as the FX-200, so you can make big power on direct injection alone.

Why you need it

The stock high pressure pump limits how far you can push a Gen 2 B58. The FX-350 uses a stainless body with a DLC-coated piston and bore, and its plunger springs are designed to work with the Spool high-lift cam lobe mod without floating at high rpm. Paired with Spool IFX150 Gen 2 injectors it is the missing piece for DI-only big power.

Fits

• BMW models with the Gen 2 B58 engine

Features

• Pump alone: about 800 whp on gasoline, 670 whp on E50, 600 whp on E85
• With IFX150 Gen 2 injectors: about 900 whp gasoline, 740 whp E50, 660 whp E85
• With injectors and the Spool cam lift mod: about 1050 whp gasoline, 950 whp E50, 800 whp E85
• Stainless construction with DLC-coated piston and bore

What's included

• Spool FX-350 high pressure fuel pump
• Mounting bracket
• Pump alignment tool
• Triple-layer low pressure line (nylon over stainless over PTFE)
• Plug-and-play HPFP adapter harness
• Spool wireless ethanol analyzer kit and 10-micron filter unit (if selected)

Good to know

Choose at checkout whether to add the Spool wireless ethanol analyzer kit, reuse one you already have, or skip it, and whether to add the Spool 10-micron filter unit. Tune changes are required to run this pump. Adequate low pressure fueling is critical for the pump and injectors, so plan an upgraded low pressure fuel pump into the build. Professional installation is recommended.