Nostrum 3.0L BMW S55/N55 Stage 2 DI Injectors - Engine Builder Magazine
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Nostrum 3.0L BMW S55/N55 Stage 2 DI Injectors

The Nostrum BMW S/N55 Stage 2 Injectors are the largest injectors currently on the market with 55% more fuel flow than stock injectors.

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The Nostrum BMW S/N55 Stage 2 Injectors are the largest injectors currently available on the market. They have been designed and tested to flow an incredible 55% more fuel than the stock S55 injectors, and 12% more fuel than the EU5 M5 injectors when compared to stock. That additional fuel flow allows for a significant increase in horsepower, with proper tuning. We estimate that these injectors will flow enough fuel to make over 900 wheel horsepower, and have already fueled more than 700 wheel horsepower vehicles –  without the need for secondary port or meth injection!  

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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 ECU’s engine management system diagnostics and safety functions – resulting in a much happier and responsive system!

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Take full advantage of your Nostrum Stage 2 injectors by pairing them with our HPFP upgrade kit, flowing an incredible 36% more fuel than the stock pumps! That additional fuel flow allows for significant torque increases earlier in the rev range, and provide the injectors with all the fuel they need to make more peak horsepower, when properly tuned. Get the best deal by bundling up!

 These products come complete with everything you need inside the box, including detailed install instructions. Nostrum back all of our parts with a lifetime warranty. 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 install to tuning. 

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