Audi RS Q8 Spool FX-350 High Pressure Fuel Pump Kit

The Spool FX-350 high pressure fuel pump kit for the Audi RS Q8 raises the fueling ceiling of the 4.0T V8 so you can run bigger turbos and higher ethanol blends.

Why you need it

The stock high pressure pump on the RS Q8 limits how far you can tune. The FX-350's larger bore adds about 90% more flow than stock, and running at 35 MPa (350 bar) versus 25 MPa on the FX-200 lets the injectors flow about 40% more fuel with shorter injection times and better atomization.

Fits

• Audi RS Q8 (4.0T V8)

What's included

• 2 x Spool FX-350 upgraded high pressure fuel pumps
• Bosch-spec 10-micron high-flow fuel filter
• Upgraded PTFE-core braided fuel lines and install hardware
• Spool ethanol content analyzer kit with phone app (optional)

Good to know

The FX-350 requires calibration changes to avoid damage, and Spool can share calibration details with your tuner. Make sure your low pressure side is upgraded too; Spool recommends a low pressure pump controller to keep the high pressure pumps fed. Professional installation is recommended.