The turbo upgrade is on your wish list. Your tuner has a power target in mind. You may even have an ethanol blend picked out. Then comes the question that can change your entire shopping cart: which high-pressure fuel pump does the build actually need?

Dorch Engineering offers several answers, and choosing between them deserves more attention than simply picking the largest number. A pump selected for a BMW N55 project serves a different application from one built for a second-generation B58 Toyota Supra. Even within the correct engine family, the fuel you intend to run and the upgrades you have planned can change which option makes sense.

At Extreme Power House, you can shop Dorch Engineering fueling products for supported BMW and Toyota applications, including multiple high-pressure fuel pump options and supporting components. That selection gives you room to buy around your own goals, whether you are refining an existing combination or preparing for a more ambitious turbo setup.

Here is how to approach the choice with a clearer idea of what belongs in your build.

Start With the Engine, Then Compare the Pump

DS15, DS25, and DS3 describe different offerings in Dorch’s lineup. They do not replace the engine and chassis information needed to order the correct product.

Consider the BMW M240i. An F22/F23 M240i appears in the B58 Gen1 DS25 application list, while the G42 M240i appears in the Gen2 listing. Both cars wear the M240i badge, but shopping by that badge alone would skip an essential distinction. The Gen1 DS25 listing specifically excludes Gen2 B58 engines.

For Gen1 B58 owners, listed DS25 applications also include the BMW F20/F21 M140i, F30/F31/F34 340i, and F32/F33/F36 440i. That gives owners of these earlier B58 cars an engine-specific route into Dorch’s upgraded fueling range.

The Gen2 DS25 listing covers a different group, including B58-powered Toyota Supra A90/A91 models, BMW G29 Z4 M40i, G20/G21 M340i, and G22/G23/G26 M440i applications. It also includes selected larger BMW models, such as the G05 X5 40i, G06 X6 40i, and G07 X7 40i. Exact engine generation and production details still need to match the product listing.

Before comparing capacity, narrow the search to the correct engine family. That one step makes every decision afterward more useful.

Where the N55 DS15 Fits Into the Conversation

For an N55 owner beginning a fueling upgrade, the DS15 is an option worth putting on the shortlist. Dorch’s N55 DS15 kit combines the upgraded pump with installation components, including high- and low-pressure lines, a mounting bracket, hardware, and an adapter harness. Its packaging follows OEM-style line routing.

That makes the shopping decision more substantial than buying an isolated pump and figuring out the connections later. You can evaluate a defined kit, review the included components, and coordinate the installation with your tuning plans.

Listed applications include the N55-powered F87 BMW M2, F22/F23 M235i, F30/F31/F34 335i, and F32/F33/F36 435i. The listing also specifies compatibility with the 2013-and-newer OE Bosch HPFP arrangement and excludes 2011–2012 N55 applications. Harness selection matters as well.

The appeal here is choosing an upgrade that fits an established goal. If your tuner identifies the DS15 as sufficient for your intended fuel and setup, that gives you a sensible product to evaluate. If the planned combination needs more capacity, compare the larger options before committing.

A useful shopping question is: “Which Dorch pump supports the setup I am actually going to run?” That question will get you further than assuming every modified N55 needs the same answer.

Why the DS25 Deserves a Serious Look

The DS25 is available in separate N55, B58 Gen1, and B58 Gen2 listings within XPH’s Dorch selection. For shoppers comparing multiple levels of fueling hardware, it is an important part of the range.

For B58 owners, the generation split remains central. The Gen1 DS25 is built around a 250-bar system, while the Gen2 version is designed around a 350-bar system. Both listings describe installation kits with supporting lines, mounting components, and an adapter harness.

Those specifications help explain why two pumps carrying the DS25 name should never be treated as interchangeable.

Think about the buying decision from the perspective of an F30 340i owner preparing for a different turbo and a G20 M340i owner planning an ethanol-focused setup. Both may be considering a DS25, but their parts selection and calibration requirements need to follow their own vehicles.

For either shopper, the next step is to compare the exact pump’s published capacity against the intended fuel and the tuner’s requirements. If the DS25 suits the target with appropriate operating margin, it belongs on the shortlist. If the project is already expected to exceed it, the DS3 becomes a more relevant comparison.

Choose with the finished combination in mind. That can help you avoid buying a pump for an intermediate setup when the next round of parts is already planned.

When the DS3 Becomes Worth Considering

Dorch’s B58 Gen2 DS3 listing advertises approximately 20 percent more fueling capacity than the DS25. The N55 DS3 listing also describes a 20 percent increase over its DS25 counterpart. Those are capacity comparisons within the respective applications, rather than promises of an equivalent increase in engine horsepower.

For a shopper building toward the upper end of a supported combination, that extra capacity is the reason to investigate the DS3. It puts another option on the table before choosing a more extensive fueling arrangement.

The decision still needs to include the rest of the system. The B58 Gen2 DS3 listing specifically states that larger injectors are required to reach the pump’s full potential. Buying the larger pump without planning the associated hardware can leave part of its capability unused.

This is where a conversation with your tuner can improve the purchase. Ask which injectors the setup requires, what fuel the calibration will use, and whether the selected pump’s capacity estimate assumes additional mechanical upgrades.

If the DS3 fits that complete plan, its place in the build is clear. You are buying capacity your intended combination can use.

Read the Fuel Column Before the Headline Horsepower Number

A fuel pump listing may show several power figures for the same product. Those figures deserve a closer look before one becomes the target for your shopping cart.

For example, the B58 Gen2 DS3 listing publishes pump-only fueling estimates of up to 950 wheel horsepower on gasoline, 800 on E50, and 700 on E85. It lists separate, higher estimates when paired with a specified cam upgrade. These are published fueling-capacity estimates under the stated configurations, rather than horsepower gains from installing the pump.

The practical lesson is straightforward: compare the figure that corresponds to your intended fuel and hardware.

If your plan revolves around E85, the gasoline estimate does not describe that same combination. If a headline includes an upgraded cam, a pump-only purchase does not recreate the advertised configuration. Keeping those distinctions visible makes it easier to compare products honestly.

When reviewing a listing, look for three things together: the fuel, the required supporting hardware, and whether the figure describes capacity or measured output from a particular car. Your tuner can then assess how the estimate relates to your own setup.

Put the Toyota Supra Into the Right B58 Category

Toyota Supra owners have a place in this selection alongside BMW drivers. XPH lists the B58-powered A90/A91 Supra among the applications for both the B58 Gen2 DS25 and Gen2 DS3.

For a Supra project, that creates a meaningful choice between two pump options within the appropriate engine category. The decision can then focus on the intended turbo, fuel, injectors, and calibration.

Before ordering, confirm the car’s engine and the exact product application. A model name alone does not establish compatibility across every engine option, and sharing the B58 family name does not make a Gen1 BMW kit the right choice for a Gen2 Supra.

The same attention benefits a Z4 M40i owner comparing those listings. Begin with the correct application, then spend your time evaluating the capacity that best suits the project.

Plan the Calibration Alongside the Hardware

A fuel pump purchase should include a plan for the software that will control it. The N55 DS15 and B58 DS25 listings specify that software changes are required. Depending on the exact product and supported tuning platform, that may involve the appropriate pump setting or a custom calibration.

Arrange that part of the upgrade before installation. Give your tuner the full product name, engine generation, intended fuel, and any injector or turbo changes happening at the same time.

It is also worth reviewing the installation options while the order is open. Check the selected harness, chassis group, included lines, and any existing ethanol-sensor arrangement against the listing. For the B58 Gen2 DS25, XPH provides specific ordering instructions for vehicles already equipped with an ethanol sensor.

These details help turn a collection of parts into a coordinated upgrade. The goal is to have the pump, connections, supporting hardware, and calibration ready for the same setup.

Make Your Dorch Purchase Around the Next Real Goal

A strong upgrade plan does not need to chase every possible future modification. It should account for the next changes you genuinely intend to make.

If the car will stay with its current turbo and fuel, choose around that combination. If a turbo upgrade and different ethanol blend are already part of the plan, bring those details into the pump decision now. If the goal requires injectors or a cam upgrade, include them in the budget rather than treating the pump’s largest published figure as a standalone result.

At Extreme Power House, the Dorch Engineering selection lets you compare multiple fueling paths in one place. Review the exact application, discuss the capacity with your tuner, and choose the components that suit the car you are building.

Ready to find your next fueling upgrade? Explore Dorch Engineering at Extreme Power House to shop high-pressure fuel pumps and supporting products for compatible BMW and Toyota Supra applications.