Dorch Engineering N55 Stage 2 HPFP Upgrade

Dorch Engineering
DE-55-2001
Fueling Fueling
$1,699.00

Harness Type *
$1,699.00

COVID-19 Update: There will be some delays, but we are still working! Orders typically ship in about 1 week from their order date.

Our Stage 2 kit is a bigger, better version of our Stage 1 kit for some of the more extreme applications. This is a complete plug-and-play kit to support 650whp and also allow for full E85 up to 500whp (these numbers can vary quite a bit depending on tuning strategy, fuel type, etc.). 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.

VERY IMPORTANT: It is imperative you know which harness is appropriate for your vehicle. If you are not sure which harness you need, Click Here

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 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

Domestic Shipping Policy

All domestic orders will be shipped to the verified billing address associated with the customer’s credit card. In the event that the products need to be shipped to another address, Kies Motorsports will verify the transaction with the customer by requesting a screenshot of our transaction on the customers online banking. Similar to how PayPal verifies orders, Kies Motorsports has implemented an authorization program that will display a unique code on the credit card transaction next to where the “Kiesmotorsports” name appears.

International Customer Policy

To best serve International Customers, Kies Motorsports only accepts PayPal VERIFIED payments and PayPal VERIFIED addresses on international orders. For international shipping quotes, please email us at info@kiesmotorsports.com

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