N55 HPFP Flow Capacities

The table below serves as a reference for the maximum fuel flow in cubic centimeters per camshaft revolution for various N55 fuel pump options. These calculations are based on the N55 cam lobe. Each engine will have varying fuel flow capacities depending on the lift and number of lobes on the camshaft.

Pump Model	Fuel Flow (cc/rev)
HDP5 (Stock N55)	0.837
HDP5 Evo (Stock B58)	0.897
HDP6 (Stock B58TU)	1.107
Dorch Engineering Stage 1	1.221
Dorch Engineering Stage 2	1.465

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: N55 HPFP Kit Installation Instructions

Dorch Engineering BMW B58 40i Fuel Pump HPFP Stage 1

Dorch Engineering BMW B58 40i Fuel Pump HPFP Stage 2

Dorch Engineering BMW N55 35i Fuel Pump HPFP Stage 1

Dorch Engineering BMW N55 35i Fuel Pump HPFP Stage 2