TGK MotorsportHPFP Rebuild KitFitment: Audi - Gen 2 4.2L (B8 RS5, A8, W12)

Overview

Over time, the factory high-pressure fuel pump (HPFP) seals in Audi 4.2L EA824 and 6.3L EA398 engines degrade, leading to fuel leaks, pressure loss, and performance inconsistencies. Additionally, upgrading to larger HPFP pistons—often used in high-performance applications—can cause the OEM seal to tear, resulting in fuel seepage and oil dilution inside the motor.

The TGK Motorsport HPFP Seal Rebuild Kit is designed to fix factory leaks, replace torn seals from HPFP upgrades, and restore fuel system integrity. Whether you're performing preventative maintenance or modifying your engine for more power, this kit ensures optimal HPFP operation and long-term reliability.

Details

Product specifications:

• Engine Compatibility: Audi 4.2L EA824 / 6.3L EA398
• Seal Material: Molybdenum Disulfide
• Application: High Pressure Fuel Pump
• Installation: Direct Fit Replacement
• Kit Contents: 2x Base Seal Kits, 2x Cam Follower Guides

Features and benefits:

• Fixes Common Factory HPFP Leaks — Direct replacement for failing OEM seals that cause fuel seepage and pressure drops.
• Prevents HPFP Upgrade Seal Tearing — Reinforced seals withstand increased pressure from larger piston kits.
• Molybdenum Disulfide Construction — Enhanced durability, superior friction resistance, and improved longevity under extreme conditions.
• Restores Fuel Pressure & Reliability — Prevents fuel seepage, pressure drops, and cold start issues for consistent performance.
• Performance & Maintenance Solution — Ideal for both daily-driven and high-horsepower builds with ethanol-tuned setups.
• Direct Fit Installation — No modifications required, works seamlessly with your OEM HPFP system.

Fitment