N55 LIFT KIT HPFP UPGRADE

Dorch Engineering N55 Lift Kit (N55LK)

Add Up to 49% More DI Fuel Flow – Unlock 1000whp+ Potential with OEM-Like Precision

We’re proud to introduce a game-changing fueling solution for the N55 community: the Dorch N55 Lift Kit (N55LK) — a simple, OEM-style upgrade with massive results. By integrating our proprietary cam lobe into a factory BMW vacuum pump housing, this lift kit dramatically increases your HPFP stroke and delivers up to 49% more direct injection fuel flow.

When paired with our DS15 or DS25 HPFP systems, the N55LK unleashes unprecedented power levels — previously unattainable with the stock DI system — while maintaining full DME control, factory safety protocols, and plug-and-play installation.

🔧 Performance Data

DS25 Pairing Note: Due to the increased fuel volume and stroke, minimum power levels must be met to maintain proper tuning and driveability. If you’re building for under 500whp, opt for the DS15 + Lift Kit combo.

🧠 Tuning Requirements

• Bootmod3 / MHD: Enable “Lift Kit” support when flashing

• WinOLS: Submit your .BIN to tuning@dorchengineering.com

💡 Injector Recommendation

For builds approaching or exceeding Stage 2 HPFP capacity, we strongly recommend upgrading to OEM S63 EU5 injectors. These flow enough to support up to 800whp on E85 and are drop-in compatible.

✅ Why Choose Dorch?

• TRUE Plug-and-Play: No cutting, splicing, or modifications — ever

• OEM Housing, Dorch Engineering Internals

• Reliable, DME-Controlled Operation

• Lifetime Warranty: Built to outperform, guaranteed to last

• World-Class Support: 24/7 access to real engineers, real answers

📦 What’s Included

• Dorch Vacuum Pump Assembly with Internal Lift Cam

• HPFP Lift Kit Mounting Flange

• Sealing Cap & Vacuum Pump Gasket

• Lifetime Warranty

🚗 Vehicle Fitment – BMW N55 (Bosch HPFP-Equipped)

F-Chassis (2013+ Bosch HPFP only):

• F87 – M2

• F20/21 – 135i, 135xi

• F22/23 – 235i, 235xi

• F30/31/34 – 335i, 335xi

• F32/33/36 – 435i, 435xi

• F10/11 – 535i, 535xi *

• F25/26 – X3/X4 35i *

• F15/16 – X5/X6 35i

E-Chassis (Bosch HPFP Only):

• E8X – 135i *

• E9X – 335i *

• E84 – X1 35i *

• E70/71 – X5/X6 35i *

⚠️ Not compatible with 2011–2012 N55 vehicles or OEM HPFPs.