4.0T Audi Upgraded High Pressure Fuel Pump Kit

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WHP Potential on Gasoline:
950 WHP
WHP Potential on E85:
750 WHP
Tune Requirement:
Recommended Tuning Suite:
Dyno Spectrum (Preferred), HP Tuners
Displacement Increase Over Stock:
Max Operating Pressure:
20% higher than stock (16.5MPa, 165bar, ~2393psi)

What sets Nostrum apart:

  • Upgraded HPFPs using all-new Hitachi pump cores  
  • Every pump is serialized and coded, then flow tested in house at multiple vehicle relevant speed &fuel pressure points 
  • Direct fitment with no adaptors, comprehensive kit with everything required for an easy high-quality installation
  • Detailed installation instructions  
  • Detailed tuning guide 

A comprehensive and complete fueling upgrade, with all the hardware and high-quality parts needed for a fast and effective installation. Provides a 33% displacement increase over stock fuel system, improved bank to bank flow delivery with our fuel line rerouting kit, and full ethanol compatibility. 

Professionally assembled using all new parts, Nostrum pumps are 100% tested for leaks and dynamically tested at engine relevant rpms and target pressures to assure quality & performance. This kit upgrade with Dyno Spectrum tuning is capable of an amazing 666 ft-lbs of torque at just 3500rpm!!!! (as demonstrated on NHP's stock RS7 development vehicle).

This complete kit includes pre-assembled low pressure fuel lines to eliminate the low pressure restriction in the factory fuel system. These lines also include abrasion sleeves, clips, and hardware for a high quality & durable installation. An ethanol sensor is pre-mounted on the stainless steel bracket for easy installation. Two different fuel line options are provided for integration between the vehicle fuel line and the ethanol sensor - one for RS7 and one for S6/S7 (see instructions). The highly detailed wire harness provides OEM grade solution to integrate the E85 sensor directly to the vehcile and integrate with the DS1 module at the OBD port. This is truly the only complete kit on the market with everything you need for a high quality, robust, effective solution for your E85 conversion! 

Nostrum backs every part we sell with a limited lifetime warranty. All Nostrum products come complete with everything you need inside the box, including detailed installation instructions. Tuning guides are also available for your dealer or tuner. We have customer service and calibration engineers on staff to provide you with any support that you may need, from installation to tuning. 

What comes in the box:

  • Two Upgraded High Flow High Pressure Fuel Pumps 
  • Fuel Line Re Route Kit with abrasion resistant sleeving and clips (RS7 and S6/S7 variants)
  • Low pressure inlet fitting plug for passenger side HPFP
  • Flex Fuel Sensor Kit with mounting bracket, hardware, and low-pressure line adapter
  • Plug and Play wire harness for DS1
  • All Installation Hardware 
  • Installation Instructions

Vehicle Applications:

  • Audi RS7 2014-2018 
  • Audi RS6 2013-2018 
  • Audi S7 2013-2018 
  • Audi S6 2012-2018 

Certified tuner:

  • Dyno Spectrum
  • OTS

Dyno graph sponsorship results:


2016 Audi S6 with upgraded turbos. Nostrum HPFPs, E70, Dyno Spectrum Stage 4 OTS.


RS7 (no bolt ons) running E85 (certified fuel rating 85% ethanol) with Nostrum's complete upgrade kit, stock turbo, Dyno Spectrum tune: 628whp@6730rpm / 666lbft@3590. At that whp level on E85 the injectors are at their limits (injector limited). The pump upgrade kit really allows for a huge build of low end torque that turns these 4.0L TT v8s into torque monsters! 

Frequently ask questions:

Q: Why do your numbers say I will make less horsepower on E85 than 93 octane? 

A: Great question! The numbers we list in the product descriptions are similar to the numbers a turbo charger lists for air flow. The numbers are the "fuel system capacity to generate power" regardless of the other engine system limitations (air handling, mechanical limitations, knock propensity). Essentially the numbers are calculated assuming "sufficiently large air flow", "sufficiently capable mechanical assemblies" and disregarding knock limits. The equation uses actual observed engine volumetric efficiency (when available from sponsorship vehicles) and fuel capacity (including target pressures) to calculate power. Gasoline has more energy per mass volume than E85. So the higher fuel flow capacity will mathematically generate higher power potential for a gasoline than a high ethanol content fuel. The other variables (air flow, spark, rotating assembly strength, charge cooling, mechanical assembly strength) are highly variable from build to build. This is why we state horsepower capacity for the fuel system – representing the potential of the fuel system if you have all the other aspects of your build addressed!  


Q: Why can't I run straight ethanol with your pump? 

A: This is incorrect! We highly recommend running E85 from the pump on our products! Intermediate ethanol blends, like E30 to E50, are problematic (with any fuel system, stock and aftermarket). What happens is that Ethanol is a polar liquid, and all petroleum distillates are nonpolar; this means most things that can dissolve in Gasoline, are not soluble on Alcohol, and vice versa. Fuel manufacturers know this and choose their additive packages accordingly. Problems arise when you take E85 and then blend it down to ~E30 - E50. At these concentrations some of the gasoline additives will come out of solution, and they form a slimy, sticky residue that clogs everything upIt seems to be regional and seasonal in nature, which makes sense when you consider that E85 blends vary with the seasons. Running straight gasoline through the fuel system seems to fix it. If you choose to run intermediate blends then we do recommend that you run straight 93 gasoline from time to time to as a fuel system maintenance practice. That being said, we absolutely highly recommend pulling up to the pump and going full Pump E85 (P-E85)!!!!  




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