A performance build becomes more exciting when the next step has a clear purpose. Perhaps you are preparing for a larger turbocharger, exploring an ethanol blend with your tuner, or developing the fuel system to support a more ambitious setup.

Spool Performance offers hardware for those projects, with products that address fuel delivery, monitoring, airflow, and supporting systems.

At Extreme Power House, we carry Spool Performance products across multiple enthusiast platforms. BMW and Toyota GR Supra owners will find an extensive selection, while Nissan, Infiniti, Mercedes-Benz, McLaren, and other applications give more drivers a reason to explore the brand.

Whether you are planning your first significant fueling upgrade or assembling a more comprehensive package, Spool gives you options to discuss with your installer and tuner before the next stage of the build begins.

Give Your Fuel System a Place in the Power Plan

A turbocharger may be the most visible part of a power upgrade, but the fuel system deserves attention alongside it.

In a direct-injection setup, the low-pressure supply, high-pressure pump, and injectors perform different jobs. Increasing the capacity of one component does not automatically increase the capacity of every other part in the system. The right combination depends on the engine, fuel, calibration, and intended output.

Spool's selection at XPH lets you explore several of these areas together, including upgraded high-pressure pumps, low-pressure pump systems, direct injectors, and ethanol analyzers.

For shoppers, that makes it easier to plan beyond a single purchase. You can identify the immediate requirement while considering how the supporting hardware will fit into the longer-term project.

Work with your tuner to establish the limitation you are addressing. A fuel pump provides capacity for an appropriate setup; it does not create a guaranteed horsepower increase by itself.

BMW B58: Match the Upgrade to the Engine Generation

B58 owners have several Spool products to compare at Extreme Power House.

The selection includes FX-200 and FX-400 high-pressure pump listings for Gen 1 B58 engines, plus FX-350 and FX400X products identified for Gen 2 applications. XPH also lists IFX150 upgraded direct injectors for Gen 1 B58 engines.

These distinctions give owners a more specific starting point than simply shopping for a “B58 fuel pump.” Choose around the exact engine generation and the requirements of your intended calibration.

For owners of Gen 1 B58-powered BMWs such as the 140i, 240i, 340i, and 440i, XPH also lists a dedicated Spool wireless ethanol analyzer kit. A separate kit is offered for BMW Gen 2 B58 applications.

This range can support different stages of ownership. You might begin by adding fuel-content monitoring, then revisit pump and injector capacity when the turbo or fuel strategy changes.

The value is in selecting a combination that serves your next goal while fitting the hardware already on the car.

BMW S58: Explore Low-Pressure Fueling for Your M Car

Spool's S58 offerings extend across both BMW M cars and performance SUVs.

XPH lists a Stage 3 DIY auxiliary low-pressure fuel pump kit for the G80 M3, G82 M4, G83 M4 Convertible, G87 M2, F97 X3 M, and F98 X4 M. The product offers Walbro 450 or Walbro 525 pump choices, multiple harness configurations, and a mounting bracket selected around the vehicle application.

That gives owners several configuration decisions to make as part of a fueling project.

A daily-driven M3 and a more extensively modified X3 M may have different requirements, even though both use the S58. The pump and activation strategy should suit the actual build.

The listing specifically recommends Spool's PWM harness with the Walbro 525 because of its higher current draw. It also requests vehicle details or a VIN so the correct bracket can be supplied.

Those details help define the package you are buying. Discuss the pump, wiring, activation method, and existing fuel system together so the installation supports the intended result.

More BMW Options for N55 and B46/B48 Builds

Spool's BMW range also covers platforms outside the B58 and S58 families.

For F-series N55 applications, XPH lists Stage 2 and Stage 3 low-pressure fuel pump upgrades. These provide options to investigate when your build's low-pressure supply needs attention.

B46/B48 owners can explore a Stage 3 low-pressure pump system and an FX-350 high-pressure pump identified for Gen 2 B46/B48 engines. The Stage 3 listing describes a twin-pump arrangement with a secondary pump activated under boost. The FX-350 listing describes a higher-pressure pump designed to complement appropriate upgraded direct injectors.

This gives four-cylinder BMW owners a path to consider as their modifications progress.

You may be refining a familiar daily driver or preparing a more involved project. Either way, choose the fueling hardware around your engine version and tuner’s plan. A well-matched setup gives each purchase a defined role and helps keep the project focused.

Toyota GR Supra: Build Around Your B58 Fueling Goals

The Toyota GR Supra has a broad Spool selection at XPH, with products covering several parts of the fuel system.

For the A90/A91 Gen 2 B58 platform, listings include an FX-350 high-pressure pump, IFX350 Stage 1 direct injectors, and IFX350-X Stage 2 direct injectors. The injector listings identify increases of 30% and 60% over factory flow, respectively.

Those percentages describe injector capacity rather than a promised increase in engine output. The appropriate choice depends on the rest of the setup, and the Stage 1 listing explicitly states that tuning changes are required.

For Supra owners, this creates choices when developing a direct-injection fueling package. Your tuner can assess the injectors alongside pump capacity, fuel composition, and the operating conditions of the planned build.

XPH also offers a Supra-specific wireless ethanol analyzer and an auxiliary split fuel system for the A90/A91 B58 application. The split system is designed around separating the direct-injection and port-injection fuel supplies in builds using both systems.

That is a more involved upgrade path, suited to a project where the complete fueling layout has been established.

Take the Supra Project Further with a Top-Mount Turbo Kit

For owners ready to make a larger change to the airflow side, XPH lists Spool billet-manifold top-mount turbocharger kits for Supra 2-port and 6-port applications.

The 6-port kit description identifies a five-axis-machined billet exhaust manifold with short runners and a single 45 mm wastegate. The listing offers multiple turbocharger selections and optional additions or coatings.

These choices make the kit a starting point for a configured build. Select the turbo around the response and output goals you have discussed with your tuner, then establish the supporting fuel, cooling, exhaust, and installation requirements.

Confirming the cylinder-head exhaust-port configuration is essential when choosing between the listed kits. Use the vehicle's actual hardware to establish compatibility.

For a Supra owner who has been planning a more substantial project, the appeal is clear: a larger upgrade with several configuration options, supported by a catalog that also addresses fueling and monitoring.

Nissan and Infiniti: Explore Spool for the VR30DDTT

Spool's selection at Extreme Power House gives Nissan and Infiniti owners options for VR30DDTT builds.

The FX-400 Stage 4 high-pressure pump listing identifies applications including the Infiniti Q50, Q60, and Nissan Z. It describes E85-compatible construction and recommends appropriate upgraded low-pressure fueling alongside the pump.

XPH also lists a VR30DDTT Stage 3 low-pressure pump upgrade. Its twin-pump arrangement uses a continuously operating primary pump and a secondary pump activated under boost, with a Hobbs switch and activation hardware described in the package.

Together, these categories give shoppers a way to investigate both sides of fuel delivery as part of a coordinated plan.

Fuel monitoring is another option. The Spool VR30DDTT wireless ethanol analyzer and filter listing identifies the 2016–2024 Infiniti Q50 and 2017–2024 Q60 equipped with that engine, with monitoring for ethanol content and fuel temperature.

Choose the specific product configuration for your vehicle. The engine application, selected kit contents, and calibration plan should all be established before installation.

Ethanol Monitoring for Mercedes-Benz and McLaren

Spool's ethanol-monitoring selection extends to other performance platforms as well.

For Mercedes-Benz, XPH lists an M276 wireless ethanol analyzer and 10-micron filter kit, alongside separate M157, M278, and M178 analyzer applications. These are engine-specific choices, giving owners a place to start when discussing fuel monitoring with their tuner.

McLaren owners can explore a wireless ethanol analyzer listed for the 570S and 600LT, with a separate product for the 720S and 765LT. The 570S/600LT listing describes real-time monitoring with wireless app-based display.

Knowing the measured ethanol content can help inform a properly developed fueling strategy. An analyzer provides information; automatic flex-fuel operation also depends on compatible control hardware and the correct calibration.

For owners already working with a tuner on ethanol blends, monitoring is a practical part of the conversation. Select the kit for the exact platform and establish how its data will be used.

Choose the Complete Package for Your Next Step

Before ordering, define the outcome you want from the upgrade. That might be more low-pressure supply, increased direct-injection capacity, fuel-content monitoring, or a turbo package for a broader project.

Then compare what each listing includes. Pump systems may offer harness or core choices. Analyzer listings may separate sensors, filters, and complete kits. Turbo packages can vary with the selected charger and optional hardware.

This is where a clear build plan pays off. It helps you purchase the components that belong together and schedule the installation with the necessary tuning work.

You can still build in stages. The goal is to make each stage useful, with hardware selected for both the current setup and the next change you intend to make.

Shop Spool Performance at Extreme Power House

A rewarding performance build brings the important systems together. Airflow, fuel delivery, monitoring, and calibration all deserve a place in the plan.

Extreme Power House offers Spool Performance products so you can explore those upgrades across multiple platforms, from BMW M cars and Toyota Supras to Nissan, Infiniti, Mercedes-Benz, and McLaren applications.

Whether you are preparing for a turbo upgrade, developing an ethanol-compatible fueling package, or adding monitoring to an existing setup, find the Spool products that suit your vehicle and your next goal.

Shop Spool Performance Fueling, Turbo, and Supporting Upgrades at Extreme Power House