Description
Unlock Maximum Fueling Potential for High-Power Builds
The IE HPFP Internal Kit is your direct solution for increasing the fuel delivery capacity of your Audi B9 3.0T or 2.9T high-pressure fuel pump. Designed to support Stage 1 & 2 Plus ECU tunes, hybrid turbo systems, and ethanol fuel blends, this upgrade maximizes flow without compromising reliability. Manufactured in the USA using precision CNC-machined components, this kit transforms your factory pump into a high-output fuel system ready for big boost and high-RPM performance.
Key Features
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Supports ethanol blends (E40–E85) and hybrid turbo builds
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Increases pump stroke volume from 448mm³ to 621mm³ (38.58% gain)
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11.68mm piston – the largest possible within OE housing
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DLC-coated tool steel pin – extreme wear resistance and self-lubrication
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Nitrided tool steel cylinder – long life under high-stress conditions
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Titanium spring retainer – ultra-light, avoids camshaft wear
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Individually tested and precision-verified to 0.00005 inch
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Designed, engineered, and manufactured in the USA
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Pump dyno-tested for long-term durability and performance
Engineering Highlights
Maximum Flow Output
The stock HPFP becomes a limitation when upgrading turbos or using ethanol-based fuel. IE’s upgraded internals replace the OEM 9.92mm piston with an oversized 11.68mm piston, increasing stroke volume by 38.58% and unlocking greater fuel flow.
Industry-Leading Reliability
Each piston and cylinder set is CNC-machined, dimensionally matched, and verified by hand using specialized metrology equipment. IE uses a proprietary fuel pump dyno to test all designs under simulated long-term operating conditions.
Advanced Coatings
The Diamond-Like Carbon (DLC) coating on the pin provides ultra-low friction and high wear resistance. The nitrided cylinder finish hardens the tool steel for long life under extreme pressures and high cycle rates.
Titanium Retainer
IE’s lightweight titanium retainer is engineered to work with the OEM spring, avoiding unnecessary camshaft wear while improving strength and reliability.
Fitment
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Audi B9 S4 (3.0T Turbocharged)
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Audi B9 S5 (3.0T Turbocharged)
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Audi B9 SQ5 (3.0T Turbocharged)
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Audi B9 RS5 (2.9T Twin Turbocharged)
Installation
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Estimated Install Time: 2–3 hours
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Requires no permanent modifications
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Specialty IE HPFP Socket Tool recommended for proper disassembly and reassembly (sold separately)
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Clean environment and careful handling of fuel system components recommended
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Professional installation advised
