M50x1.5 to AN6 High Pressure Fuel Pump HPFP Cap for VAG2.0L TSI EA888 Gen 3

Precision Billet HPFP Cap for Custom Fuel Systems

Upgrade your vehicle’s fuel delivery. Engineered specifically for the VW/Audi EA888 Gen 3 platform, this cap allows you to seamlessly adapt your factory high-pressure fuel pump to a standard -6AN (9/16”-18) fitting, making it the ideal solution for custom fuel lines, ethanol conversions, and high-performance fuel system builds.

CNC Machined for Maximum Durability

Crafted from a single piece of premium 6061-T6 billet aluminium, this HPFP cap offers superior strength and resistance to fuel degradation. Unlike cast alternatives, the one-piece CNC construction ensures zero porosity, eliminating the risk of leaks under the extreme pressures generated by direct-injection fuel systems. The lightweight, corrosion-resistant design provides a lifetime of reliable service in even the most demanding engine bays.

Key Features & Specifications

• Superior Construction: Fully CNC-machined from one-piece 6061-T6 billet aluminium.

• Precise Threading: Features an M50x1.5 thread—a direct fit for the factory HPFP housing on EA888 Gen 3 engines.

• AN Outlet Size: Equipped with a -6AN (9/16”-18 SAE) outlet for easy integration with aftermarket fuel rails and PTFE lines.

• Baffle Plate Included: Includes a stainless steel round baffle plate to regulate fuel flow, minimise internal turbulence, and ensure consistent pump performance at high RPM.

Direct Replacement & Easy Installation

This cap is designed as a direct replacement for the factory HPFP cap. During installation, simply insert the supplied stainless steel baffle plate into the cap and secure your AN fitting. As fuel pressure builds, the baffle automatically positions itself to maintain optimal fuel flow and prevent cavitation, ensuring your high-pressure pump operates efficiently.

Why Replace Your Factory HPFP Cap?

Upgrading to an AN-style HPFP cap is essential for anyone looking to:

• Run E85 or Ethanol Blends: Increase fuel flow capacity to support the higher volume requirements of flex-fuel tuning.

• Build Custom Fuel Systems: Easily connect aftermarket fuel rails, regulators, and lines with standard -6AN fittings.

• Improve Reliability: Replace the restrictive or brittle factory cap with a robust billet unit designed to handle increased fuel pressures.

• This HPFP cap fits all vehicles equipped with the 2.0L TSI / TFSI EA888 Gen 3 engine utilising the M50x1.5 thread configuration.

Audi Applications:

• Audi A3 8V (2.0 TFSI)

• Audi S3 8V (2.0 TFSI)

• Audi TT / TTS 8S (2.0 TFSI)

• Audi A4 B9 (2.0 TFSI)

• Audi A5 B9 (2.0 TFSI)

• Audi Q5 (2.0 TFSI)

Volkswagen Applications:

• VW Golf GTI MK7 / MK7.5

• VW Golf R MK7 / MK7.5

• VW Arteon (2.0 TSI)

• VW Passat B8 (2.0 TSI)

• VW Tiguan (2.0 TSI)

Technical Specifications

Upgrade your fueling setup today. Whether you are preparing for a big turbo build or simply want a more reliable fuel connection.