Dorch DS3 High Pressure Fuel Pump Upgrade - Gen 1 B58

The DS3 is Dorch's biggest single pump for the Gen 1 B58. It has the largest bore Dorch makes, and Dorch rates it at about 20% more fuel than the DS25. It's meant for big-turbo and high-ethanol builds, and it pairs with Dorch's injectors and cam upgrades.

What you get

• DS3 high-pressure fuel pump with mounting hardware.
• Dorch high-pressure line rated to 250 bar.
• Engine cover spacer and a plug-and-play adapter harness.

Flow, as Dorch rates it

• Gasoline: about 860 whp (about 1,150 whp with Dorch's +40% Lift Kit exhaust cam).
• E50: about 725 whp (1,000 whp with the cam).
• E85: about 630 whp (870 whp with the cam).

Good to know

• Dorch's kits are built as a drop-in for the factory pump position: the hoses follow the OEM routing, nothing is cut or bent, and the DME keeps full control of the pump. Each kit comes with Dorch's own high-pressure line to the fuel rail instead of reusing the factory line, and Dorch backs its pumps with a lifetime warranty.
• The pump needs software that supports it. Dorch's in-house calibration team supports its pumps, so tell your tuner which pump you're running.
• Fits Gen 1 B58 cars through the 2019 model year: M140i, M240i (F22), 340i (F30), 440i (F32), 540i (G30), 640i GT (G32), 740i (G11) and X3/X4 M40i (G01/G02). It does not fit 2020+ (Gen 2) B58 cars.

Brand: Dorch Engineering · Part #: DE-581-30E

• Ships from the brand or distributor, usually in 3–7 business days.
• Free US shipping on orders over $250.
• Unused parts can be returned within 30 days. Some items are marked no-refund in their description.

Full details are on our shipping and returns page.