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APR High Pressure Fuel Pumps | Audi S5 4.2L V8 (Pre Nov 2008) (MS100076)

APR High Pressure Fuel Pumps | Audi S5 4.2L V8 (Pre Nov 2008) (MS100076)

MS100076

Out of stock

$2,999.95 USD
$3,374.95 USD $2,999.95 USD
ADDITIONAL DISCOUNTS APPLIED AT CHECKOUT Sold out

The APR High Pressure Fuel Pump (HPFP) for 2008-2012 Audi S5 4.2L V8 (Pre-November 2008) is a high-performance replacement component designed to ensure reliable fuel delivery at elevated pressures. Crafted with precision-machined internals, it features dimensional tolerances as tight as .00004" and geometric tolerances of .00005", which are critical for optimal operation. The plunger and barrel are made from certified, heat-treated bearing-grade stainless steel, with the plunger receiving a diamond-like coating for exceptional surface hardness and durability. All internal seals, including the spring seal, are replaced to prevent leaks and maintain consistent pressure. The pump retains the factory pivoting head to reduce cam follower wear and piston side loading, ensuring long-term reliability and performance.

This high-pressure fuel pump is a direct replacement for 2008-2012 Audi S5 models equipped with the 4.2L V8 engine, specifically for vehicles manufactured before November 2008. It is intended for use in high-performance applications, including street and track driving, where precise fuel delivery is essential. Installation requires a clean environment and careful machining of internals to meet strict tolerances. The kit includes the pump with all internal components replaced and upgraded for durability. Designed for enthusiasts seeking a reliable upgrade, this pump enhances fuel system performance and consistency in demanding driving conditions.

Overview

APR High Pressure Fuel Pumps

Fits 2008–2012 Audi S5 4.2L V8 (Pre Nov 2008)

Part #: MS100076

Overview

The APR High Pressure Fuel Pump (HPFP) is a high-performance replacement component designed specifically for the 2008–2012 Audi S5 with a 4.2L V8 engine manufactured before November 2008. Crafted for enthusiasts and professionals seeking reliable fuel delivery, this pump ensures consistent high-pressure fuel supply essential for optimal engine performance. Its precision engineering and durable materials support the demands of high-performance driving, providing improved response and reliability over stock units.

Key Features

  • Machined from certified, heat-treated bearing-grade stainless steel for durability
  • Plunger undergoes a diamond-like coating for exceptional surface hardness
  • Manufactured with extremely tight dimensional tolerances (.00004") and geometric tolerances (.00005")
  • Includes a properly specified spring to prevent plunger float and ensure consistent operation
  • Internal seals, including the spring seal, are replaced for optimal sealing and longevity
  • Factory pivoting head retained to reduce cam follower wear and piston side loading

Construction & Design

The APR HPFP internals are machined with extreme precision in a clean environment to meet the highest standards of quality. The use of heat-treated stainless steel and specialized coatings ensures the pump can withstand the rigors of high-pressure fuel delivery, maintaining performance and reliability over time. The design emphasizes durability, precise fitment, and minimal wear, making it an ideal upgrade for high-performance applications.

Installation & Fitment

Designed as a direct replacement for the factory pump, installation requires standard mechanical skills and proper handling to ensure the internal components are installed in a clean environment. Correct installation is critical to prevent failure and to achieve the intended performance benefits.

What’s Included

Each package includes the high-pressure pump internals, properly specified spring, and all necessary seals for a complete upgrade.

Ideal For

Performance enthusiasts and professional tuners seeking to improve fuel delivery reliability and consistency in their Audi S5 4.2L V8 engine.

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