Dorch DS25 HPFP Upgrade - BMW N55

QT Parts is a Finnish online store.

Our warehouse is located in Nokia, Finland.

You can collect your order directly from us if needed. Simply select “Pickup” at checkout.

Pay securely with multiple payment methods, including invoice and installment plans through Klarna.

The delivery time for products in stock is 1-5 business days. We ship worldwide.

If the product is not in stock and it is a pre order product, the average delivery time is 5-21 business days. If the product has a longer delivery time than previously announced, we will be in touch. International orders may be subject to VAT, import duties, and customs fees upon arrival in the destination country.

Terms for product returns:

• You must return the ordered products within 14 days of receiving
• The products must be unused and without damages
• Commission fee for handling returns is 21,90€
• For product returns, the customer is in charge of the return costs. Only door to door service (Express)
• Shipping costs are not refunded

For international orders sales are final and non-refundable. Once an order is placed, it cannot be canceled or returned. By placing an order, you acknowledge and agree to these terms.

Return address: QT Parts, Vasarakatu 8B, 37150 Nokia, Finland.

Pre order / made-to-order products

If the product you have ordered is a pre order or made-to-order item, it is not subject to the 14-day right of withdrawal or return under consumer protection laws, as the product is manufactured or sourced specifically based on the customer’s individual order.

If you wish to cancel your order before receiving the product, we will refund 50% of the total order amount.

This condition applies to the following product categories:

• Suspension
• Engine Tuning
• Engine Parts
• Exhaust Systems
• Fueling
• Turbochargers/superchargers
• Drivetrain
• ECE-approved Downpipes

All of the above products are manufactured or sourced individually based on the customer’s order, and therefore cannot be returned after delivery, unless the product has a manufacturing or material defect.

In the event of such a defect, the standard liability for defects as provided by consumer protection legislation shall apply.

Dorch DS25 HPFP Upgrade | BMW N55

Welcome to the world of peak performance for direct-injected N55 engines. The Dorch DS25 represents the most powerful and high-performing high-pressure fuel pump on the market – designed for demanding tuning applications aiming for maximum power and flow capacity. If your goals exceed the capacity of a single pump, the DS25 can be combined with Dorch's N55LK solution for even greater performance.

The DS25 replaces the previous "Dorch Stage 2" (DS2) pump and raises the bar to a new level. This completely redesigned Stage 2.5 pump offers improved flow efficiency, higher operating pressure, and even better reliability.

Technical Specifications (DS25-250)

• Performance increase: up to +38–49 % (N55LK)
• Max flow (gasoline): 750–1000 whp
• Max flow (E85): 550–770 whp
• Operating pressure: up to 250 bar

Key Features

• Completely redesigned structure: Optimized pressure chamber, spring, piston travel, and volumetric efficiency
• Class-leading flow: The highest-flowing N55 HPFP on the market – now even more powerful
• 250 bar operating pressure: Maximizes direct injection injector capacity
• Improved installation: New design facilitates hose routing and speeds up installation

Plug & Play Installation

Like its predecessor, the DS25 is completely plug-and-play:

• No cutting, bending, or modifications
• Direct OEM compatibility
• Full DME control like the original pump
• All factory safety and control functions are retained

Note: The pump requires a software update for operation.

• MHD / Bootmod3: select pump upgrade during flashing
• Other solutions: send .BIN file to a knowledgeable tuner.

Package Contents

• Dorch HPFP pump + mounting hardware
• Dorch high-pressure fuel line
• PTFE low-pressure hose
• Plug & Play adapter harness
• Lifetime warranty

Compatibility

Suitable for several BMW models equipped with the N55 engine:

• 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-series models (135i, 335i, X1, X5, X6)*

* Only 2013+ models with original Bosch HPFP

❌ Not compatible with 2011–2012 N55 engines