Dorch Engineering Stage 1 High Pressure Fuel Pump – BMW N55 (F Series)
This is a complete plug-and-play kit to support up to 550whp (this number can vary quite a bit depending on tuning strategy and the blend of ethanol). There’s no cutting, no bending, no crimping, etc. This kit drops right in with full control from the DME, just like the OEM pump. All of the safety and sophistication of the stock DME remain in place.
N55 HPFP Flow Capacities
The table below serves as a reference for maximum fuel flow in cubic centimeters per camshaft revolution for various N55 fuel pump options. These calculations are based on the stock N55 cam lobe unless otherwise noted (Lift Kit).
| Pump Model | Fuel Flow (cc/rev) | Fuel Flow w/ Dorch Lift Kit (cc/rev) |
|---|---|---|
| HDP5 (Stock N55) | 0.837 | NOT COMPATIBLE |
| HDP5 Evo (Stock B58) | 0.897 | NOT COMPATIBLE |
| HDP6 (Stock B58TU) | 1.107 | NOT COMPATIBLE |
| Dorch Engineering Stage 1 | 1.221 | 1.818 |
| Dorch Engineering Stage 2 | 1.465 | 2.181 |
NOTE: When combined with our N55 Lift Kit, this pump is capable of 750whp on E10 and 600whp on E85!
Software changes are required to run this pump. If using MHD or Bootmod3, simply check the box for our pump upgrade when flashing.. Otherwise, please send your .BIN file to tuning@dorchengineering.com for the appropriate software changes. This change is free of charge for all of our customers.
Kit Contents:
- HPFP w/ Hardware
- High Pressure Line
- Low Pressure Line
- Low Pressure Line Bracket
- Plug-n-Play Adapter Harness
Kit Fitment:
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
E8X – 135i *
E9X – 335i *
E84 – X1 35i *
E70/71 – X5/X6 35i *
*ONLY 2013+ models with OE Bosch HPFP
KIT NOT COMPATIBLE with 2011-2012 N55 Vehicles
Installation Instructions:
