Precision Raceworks N55 / S55 Stage 2 High-Flow Direct Injectors

55% More Flow • 950+ WHP Gas • E85 Compatible • Fully Tuner Supported

Unlock the full potential of your N55 or S55 engine with the Precision Raceworks Stage 2 Direct Injectors — engineered for maximum fueling without the need for port injection. These high-flow injectors were co-developed with NHP and offer a massive 55% increase in flow over stock, giving you the headroom to build serious power with OEM-level drivability.

💪 Top Features

• Supports up to 950 WHP on gasoline or 715 WHP on E85 (*with full supporting mods)

• 55% higher flow vs OEM N55/S55 injectors

• E85-compatible and corrosion-resistant materials

• Tested, calibrated, and matched as a set of 6 using advanced high-pressure flow benches

• Plug-and-play installation with factory fitment and easy tuning support

• Fully supported by MHD, Bootmod3, Ecutek, and more

• Optional: Use with the Precision Raceworks Direct Injector Tool for faster, easier installs

✅ Benefits

• Fuel more power without port injection

• Maintain stock-like cold starts and idle characteristics

• Save tuning time with precisely matched injectors (within tight tolerances)

• Compatible with gasoline, ethanol blends, and full E85

• Backed by Precision Raceworks quality and reputation

⚙️ Vehicle Fitment — BMW N55 & S55 Engines

1 Series

• 135i: 2013

• 135is: 2012–2013

• M135i: 2012–2015

• M135i LCI: 2015–2016

2 Series

• M235i: 2013–2016

• M2: 2016–2018

• M2 Competition (S55): 2018–2021

3 Series

• 335i / 335i xDrive: 2011–2015

• ActiveHybrid 3: 2013–2015

• M3 (S55): 2014–2018

4 Series

• 435i / 435i xDrive: 2013–2016

• M4 (S55): 2014–2020

5 Series

• 535i / 535i xDrive: 2013–2017

6 Series

• 640i: 2011–2018

7 Series

• 740i / 740Li: 2013–2015

X Series

• X1 xDrive35i: 2013–2015

• X3 xDrive35i: 2013–2017

• X4 xDrive35i: 2014–2016

• X5 xDrive35i: 2014–2018

• X6 xDrive35i: 2014–2019

Z Series

• Z4 28i: 2016

📦 What's Included

• (6) Precision Raceworks Stage 2 High-Flow Direct Injectors

• Flow match & calibration certification

• Optional: Injector installation tool available separately

📈 Take the Guesswork Out of Fueling

Whether you're running full E85 or chasing 900+ wheel horsepower, these injectors give you the confidence to fuel your build properly — with no compromises in reliability, consistency, or ease of use.