BMW S63 High Flow DI Injectors

MSRP: $2,699.00
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WHP potential on gasoline:
1300 WHP* (Calculated assuming 24 MPa fuel pressure and 328 g/(kW/hr) BSFC)
WHP potential on E85:
975 WHP* (Calculated assuming 24 MPa fuel pressure and 328 g/(kW/hr) BSFC)
Flow Rate:
20.2 g/s @ 100 bar
Flow rate increase over stock S63TU (EU5) Injector:
Flow rate increase over stock S63TU2 (EU6) injector:
Max Operating Pressure:
250bar / 25MPa / 3625psi
Tune requirement:
Recommended Tuning Suite:
MHD (Bootmod3 coming soon!)

What sets Nostrum apart:

  • +31% higher flow than stock S63TU (EU5) M5/M6 <20.2 g/sec vs 15.4 g/sec> 
  • +59% higher flow than stock S63TU2 (EU6) X5M/X6M <20.2 g/sec vs 12.7 g/sec> 
  • Direct Fit, no harness or spacers required 
  • OEM decoupling rings pre-installed 
  • Ethanol Compatible 
  • OEM comparable spray pattern 
  • Every injector is tested statically and dynamically to ensure best quality product and set batching 
  • Includes comprehensive installation

You asked and we listened – upgraded injectors for the S63 have arrived! While most people use M5 injectors in other platforms as an upgrade, the M5 owners were left with very little option to get more fuel into their engines without having to rely on sketchy port or meth injection systems. Flowing 31% more than the stock M5 EU5 injectors and a 250bar operating pressure capability, the Nostrum S63 injectors are the answer. We estimate that these injectors will flow enough to support up to 1300 wheel horsepower - without supplemental fueling!

Inside the box, you will find everything you need to get your new injectors installed quickly, including pre-installed decoupling rings and detailed installation instructions for a high quality install. When you are ready to tune, we have injector tuning data available for your dealer or tuner. Being that everything is installed like a factory part, there’s no need to worry about secondary injection controllers, filling meth tanks, clogged meth injectors, or any of the other complex solutions people use to squeeze more power out of these vehicles. Additionally, these injectors are operating with all the OEM DME’s diagnostics and safety functions intact – resulting in a much happier and responsive system!

Covered by Nostrum’s limited lifetime warranty, you can rest easy knowing we are here to support you every step of the way. We have customer service and calibration engineers on staff to provide you with any support that you may need, from install to tuning. Tuning guides are available for your dealer or tuner, or we can help set you up with a tuner if you don’t already have one!

Why is spray pattern important?

While increasing flow rate is critical to making more horsepower, there are other factors to consider when choosing fuel system upgrades. A bigger injector isn’t always a better injector! It can flow a large volume of fuel at WOT, but if the spray pattern is poor, you can expect poor idle quality, poor drivability, increased knock propensity, soot, NVH (noise vibration harshness,) and tuning difficulty. Additionally, the wrong spray pattern can result in liquid fuel impinging in the cylinder walls, causing oil dilution, which increases mechanical wear to internal engine components.

Nostrum has invested significant time and resources into acquiring the equipment and machinery necessary to deliver an OEM level of quality on our injectors. Our spray patternation and arc flash machines (images below) give us an unparalleled look at how an OEM injector is designed and how it operates.  Our engineers design and develop injectors to optimally interact with engine air flow inside the combustion chamber to improve fuel evaporation and create a homogenous air-fuel mixture that results in a higher combustion quality. For you, this means that you can expect our injectors to perform at their absolute best regardless of what you are asking from them, from daily driver duty to setting new ¼ mile records.

Verified vehicle application list: 
  • 2012-2017 BMW M5
  • 2012-2018 BMW M6
  • 2015-2019 BMW X5 M
  • 2015-2019 BMW X6 M
Recommended tuners: 

Dyno graph sponsorship results:

*Horsepower and Torque numbers are approximate and can vary significantly depending on numerous factors including what supporting upgrades are done to the vehicle, ambient temperature, elevation, road surface, tire selection & condition, fuel octane and quality, vehicle weight, and more.  The advertised numbers herein are based on optimal conditions and utilizing proper supporting modifications.  Your results may vary.

Frequently ask questions:

Q: Will these also fit an N55/S55?

A: Yes, but they are batched in sets of 8. For sets of 6, see: N55/S55 Stage 3 injectors

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!  


Limited Lifetime Warranty Policy Warranty only covers Nostrum manufactured products. (Distribution products are covered under original manufacturer’s warranty.) This policy is in force for products delivered after 01/01/2021. Warranty explicitly excludes the cost of labor for product installation and removal, diagnostics, or troubleshooting. Warranty does not cover items that have been tampered with, misused, improperly installed, or used in an improper application. Warranty may not apply to shipping damages. Warranty covers manufacturing defects: Damaged upon opening, not including shipping damages Broken connector Terminal loose Damaged or missing O-rings, combustion seals, or spacers Logs, tune files, and diagnostic results will be required before product is returned for the warranty replacement of all of Nostrum’s products. If a Nostrum product is assumed to have failed and sent in for a warranty claim, an inspection and performance test will be performed. If no fault is found there will be a Service Charge of $125.00 applied before the component is returned. Nostrum will replace at no charge any Nostrum product that is deemed under warranty. Warranty is non-transferable and limited to original purchaser for vehicle application. Customer must fill out Nostrum’s Return Material Authorization Form completely including product serial number for return to be accepted. Warranty applies only to items purchased directly through Nostrum High Performance or an authorized Nostrum High Performance Retailer or Distributor. Nostrum High Performance products purchased through authorized Retailers/Distributors are to be returned to and refunded by the retailer. Customer may be responsible for any shipping charges that may occur. In the case that a product is deemed defective and covered under warranty, Nostrum High Performance will pay ground shipping back to the customer. Apparel (T-Shirts, hats, etc.), mugs, and decals are not covered by this policy. Warranty is determined solely by Nostrum High Performance, and all product claims are to be inspected according to Nostrum High Performance standards.
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