Dorch Engineering B58 Stage 1 HPFP Fuel Pump Upgrade Kit - BMW M140i M240i 340i

Dorch Engineering Stage 1 Fueling Upgrade for BMW B58 Engines

Raise the fueling ceiling on your B58 without compromise. This Dorch Engineering Stage 1 high-pressure direct injection pump delivers the extra flow your tuned BMW needs while keeping stock-like drivability, factory safety strategies and OEM fitment. It is a true bolt-in assembly that uses the original connectors and lines, supports up to 560 wheel horsepower on E10 blends depending on calibration and hardware, and requires no cutting or permanent modification.

At MJ Modifications we have installed this unit on multiple customer cars and our own shop vehicles. Results have been consistently excellent with smooth idle, strong midrange, rock-solid rail pressure under heavy load and zero warning lights. Customers choose it for its reliability, quality machining and how seamlessly it integrates with common B58 tunes.

Key reasons enthusiasts choose this B58 fueling solution

• More headroom than stock HDP5 Evo and HDP6 pumps for tuned B58 petrol engines
• Maintains full ECU controlled safeguards and cold-start behaviour
• Reversible installation using factory-style connectors and brackets
• Ideal for Stage 1 and Stage 2 calibrations on E10 and pump fuel
• Compatible with popular flash platforms including Bootmod3, MHD and MG Flasher
• Proven on UK road, dyno and track use for dependable performance

Flow comparison per camshaft revolution

• HDP5 Evo original equipment: 0.954 cc per rev
• HDP6 later OE unit: 1.178 cc per rev
• Dorch Engineering Stage 1: 1.299 cc per rev
• Dorch Engineering Stage 2: 1.558 cc per rev

Values are referenced to the B58 cam lobe profile. Real-world output may vary by engine variant and lobe count.

Tuning and software setup

A calibration change is required. With Bootmod3, MHD or MG Flasher simply select the appropriate pump option during the flash process. If you are using custom tuning, email your BIN file to tuning@dorchengineering.com for the necessary changes. Dorch provides this update at no charge for verified customers.

What you receive in the kit

• High-pressure DI pump with mounting hardware
• High-pressure line
• Quick-connect low-pressure line
• Low-pressure line support bracket
• Plug-in adapter harness

Compatible BMW models using the B58 engine

• F20 F21 140i and M140i including xDrive
• F22 F23 240i and M240i including xDrive
• F30 F31 F34 340i including xDrive
• F32 F33 F36 440i including xDrive
• G30 G31 540i including xDrive
• G32 640i including xDrive
• G11 G12 740i including xDrive
• G01 X3 M40i
• G02 X4 M40i

Fitment applies to vehicles up to and including model year 2019. Not suitable for 2020 onward B58 applications.

Installation service

Professional fitting is recommended. MJ Modifications in Warwickshire offers in-house installation and setup. Request a fitting quote at info@mjmodifications.co.uk.

Search-friendly terms our customers use

B58 fueling upgrade UK, BMW M140i fuel pump upgrade, M240i fuel system, 340i fuel pressure pump, 440i direct injection pump, 540i petrol high pressure pump, 640i fuel rail pressure upgrade, 740i DI pump, X3 M40i fuel pump kit, X4 M40i fueling kit, B58 ethanol E10 compatible pump, HDP5 Evo replacement, HDP6 swap, B58TU pump alternative, Stage 1 DI pump, BMW B58 fuel system upgrade, B58 rail pressure upgrade, B58 fuel pump kit UK, Bootmod3 pump option, MHD pump upgrade, MG Flasher pump support, BMW B58 performance fueling.