APR High Pressure Fuel Pump for 2005-2008 Audi A4 Quattro. This direct-injection upgrade increases displaced volume by 41% to support higher airflow and help keep commanded rail pressure steady.

APR increases displacement by enlarging the pressurizing cylinder and pairing it with precision internals. The plunger and barrel are heat-treated bearing-grade stainless; the plunger is DLC-coated, with an upgraded, weight-matched spring. Built on genuine Hitachi pump bodies and sensors, each unit is assembled and bench-tested. For best results, inspect or replace the cam follower during install and use suitable software.

Features

• 41% increase in displacement vs stock
• Maintains rail pressure under demanding conditions
• DLC-coated, heat-treated bearing-grade stainless plunger
• 0.00004" dimensional and 0.00005" geometric tolerances
• Genuine Hitachi pump bodies and sensors; assembled and bench-tested

Have fitment or tuning questions? Call our team. We offer professional installation and customization at our Austin, Texas and Los Angeles, California area shops: 512-982-9393 (TX) and 562-981-6800 (CA).

Ordering multiple items? Contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov