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Dorch Engineering BMW N55 Stage 1/2 High Pressure Fuel Pump HPFP (M2, 135i, M135i, M235i, 335i & 435i)
Description - Stage 1
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.
Description - Stage 2
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.
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||
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 firstname.lastname@example.org for the appropriate software changes. This change is free of charge for all of our customers.
In the box
- HPFP w/ Hardware
- High Pressure Line
- Low Pressure Line
- Low Pressure Line Bracket
- Plug-n-Play Adapter Harness
To ensure the part(s) you have ordered fits your vehicle, we run a compatibility check prior to dispatch. We can do this either using your registration number(UK) or the last 7 digits of your VIN. Simply enter your car details prior to checkout.
- F87 – M2
- F20/F21 – M135i, M135ix
- F22/F23 – M235i, M235ix
- F30/F31/F34 – 335i, 335ix
- F32/F33/F36 – 435i, 435ix
- F10/F11 – 535i, 535ix
- F25/F26 – X3/X4 35ix *
- F15/F16 – X5/X6 35i & 35ix
- E82/E88 – 135i *
- E90/E91/E92/E93 – 335i & 335xi*
- E84 – X1 35ix *
- E70/E71 – X5/X6 35i & 35ix *
*ONLY 2013+ models with OE Bosch HPFP
Please Note: KIT NOT COMPATIBLE with 2011-2012 N55 Vehicles
Type A harness adapter is for car manufactured before 2014, and Type B harness adapter is for car manufactured after 2014, please contact us to confirm if yours is manufactured towards the end of 2013 and beginning of 2014 so we can double check for you prior to ordering.
NOTE: If you have an N55 equipped vehicle that is not listed, please contact us at email@example.com for fitment information.
Dorch Engineering Lifetime Warranty
DE-55-1001 (Stage 1)
DE-55-2001 (Stage 2)
Next Day UK Delivery
Get FREE Guaranteed next day UK delivery for orders over £99 (exc. VAT), excluding larger items and certain remote postal codes/areas. Same day dispatch available if your order is placed before 1pm UK Time on all in stock items!
We ship worldwide via DHL International, simply enter your full address at checkout to see the shipping option(s) and quote(s). Same day dispatch available if your order is placed before 1pm UK Time on all in stock items!