N55 DS25 HPFP UPGRADE

Dorch Engineering DS25-250 HPFP Kit

Stage 2.5 High Pressure Fuel Pump for BMW N55 Engines

Supports up to 1000whp on Gasoline | 790whp on E85

Welcome to the future of N55 direct injection fueling. The DS25-250 is our latest and highest-performing HPFP upgrade, succeeding the acclaimed “DS2” (Stage 2) system. Built from the ground up to maximize flow and reliability, this drop-in pump is designed for serious power seekers who want OEM-like integration with record-breaking performance.

🔥 DS25 Performance Specs

Pairing this pump with our N55 Lift Kit unleashes unmatched DI fueling performance — without the need for port injection.

🛠️ What’s New in DS25?

• Redesigned internals for maximum volumetric efficiency

• Enhanced spring rates and plunger depth

• Repackaged externally for cleaner hose routing and easier installation

• Built to maintain full control and safety via your OEM DME

This is the highest flowing, most reliable N55 HPFP available — engineered for full 250 bar operation to get the most from upgraded DI injectors like the S63 EU5.

🧠 Tuning Requirements

• Requires updated calibration

• MHD & Bootmod3: Check the box for Dorch HPFP during flash

• For WinOLS users: Send your .BIN file to tuning@dorchengineering.com

✅ Why Choose Dorch?

• TRUE Plug-and-Play: No cutting, bending, or crimping — ever

• OEM-Level Fitment: Includes 250 bar-rated Dorch hardline

• LIFETIME WARRANTY: Trusted reliability, backed for life

• WORLD-CLASS SUPPORT: 24/7 tech and tuning assistance

• OEM-Calibrated Files: Developed using factory-grade tools by in-house calibration engineers

📦 What’s Included

• DS25 HPFP Assembly

• Dorch High Pressure Fuel Line (250 bar rated)

• PTFE Low Pressure Hose

• Plug-and-Play Electrical Adapter Harness

• Mounting Hardware

• Dorch Lifetime Warranty

🚗 Vehicle Compatibility – BMW N55 Engines

F-Chassis (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 (2013+ with Bosch HPFP Only):

• E8X – 135i *

• E9X – 335i *

• E84 – X1 35i *

• E70/71 – X5/X6 35i *

⚠️ Not compatible with 2011–2012 N55 vehicles. Must be equipped with OEM Bosch HPFP.

💡 Maximize with Our N55 Lift Kit

Need more flow? Add the +38% or +49% N55 Lift Kit to push the DS25 beyond 900–1000whp on gasoline and up to 790whp on E85. Don’t forget to pair with S63 EU5 injectors for best results.