USP Motorsports Stage 3 Auxiliary Low Pressure Fuel System - USPFSIFS446

Unleash the full potential of your Volkswagen or Audi 2.0T FSI engine with the USP Motorsports Stage 3 Auxiliary Low Pressure Fuel System — engineered to overcome the factory fuel system’s limitations and support high-horsepower builds exceeding 600+ WHP. Designed through extensive R&D, this system addresses the critical shortcomings of the low-pressure fuel system on the FSI platform, which is often overlooked in performance upgrades.

The factory in-tank fuel pump struggles to deliver consistent pressure and volume beyond ~350 WHP. Even with upgraded pumps such as the APR in-tank option, the system hits a ceiling around 400 WHP. To solve this, USP developed a true auxiliary fuel system that integrates a secondary in-tank fuel pump supported by a load-based pump controller, enabling scalable performance up to 700 WHP while maintaining safe air/fuel ratios under boost.

This setup is not a generic add-on — it's a fully engineered solution designed to integrate with the complex Pulse Width Modulation (PWM) control logic of the factory ECM. The result is a seamless and reliable fuel delivery system, fully compatible with return-less factory setups, and tested on USP's own 605 WHP MK5 GTI.

Key Features:

• Supports Over 700 WHP – Designed to provide consistent fuel delivery for high-output FSI builds.

• Secondary High-Flow In-Tank Fuel Pump – Independently supports up to 600 HP fuel flow capacity.

• Advanced Load-Based Fuel Pump Controller – Activates the auxiliary pump only under high-load conditions to ensure efficiency and longevity.

• Full Compatibility with PWM-Controlled Systems – Seamlessly integrates with the factory ECU logic.

• Includes Preassembled Components – Fuel lines, distribution block, wiring, and fittings are all ready for plug-and-play installation.

• Used on USP’s 605 WHP MK5 GTI – Proven reliability and performance under demanding real-world conditions.

• Detailed Installation Instructions Included – Designed for experienced installers and tuning professionals.

What’s Included:

• High-Flow In-Tank Fuel Pump

• Load-Based Fuel Pump Controller

• Preassembled Fuel Lines and Fittings

• Fuel Distribution Block with Integrated Check Valve

• Complete Wiring, Terminals, and Connectors

• Comprehensive Installation Instructions

Fitment:

This Stage 3 Auxiliary Fuel System is specifically designed for VW and Audi models equipped with the 2.0T FSI engines, including BPY, CBFA, CCTA, and other related variants. Compatible with manual and DSG transmissions.

Common Applications Include:

• Volkswagen GTI (2006–2013)

• Volkswagen Golf R (2012–2013)

• Volkswagen Jetta GLI (2006–2013)

• Volkswagen Jetta 2.0T / Wolfsburg Edition / SEL / Base (2006–2013)

If you're unsure of your compatibility, please contact us for confirmation before purchase.

Upgrade your 2.0T FSI-powered VW or Audi with the USP Motorsports Stage 3 Auxiliary Low Pressure Fuel System — the ultimate solution for fueling high-horsepower builds reliably and efficiently.