Nostrum - B58 Gen 1 Big Bore High Pressure Fuel Pump Kit

Nostrum B58 Gen 1 Big Bore HPFP & Injector Bundle

Unlock your B58’s true potential — No compromises.

🚀 What Sets Nostrum Apart:

• +63% HPFP flow increase vs. OEM

• Direct fitment – no spacers, harnesses, or permanent modifications

• 100% ethanol compatible – run E85 or blended fuels safely

• Includes detailed installation & tuning guides

• Lifetime warranty on all Nostrum-manufactured parts

💡 The Problem:

The B58 Gen 1 engine is a phenomenal platform — but it’s held back by a single, factory high-pressure fuel pump. Unlike the dual-pump S55, the B58 is bottlenecked when fuel demand rises with power mods and ethanol. That’s where Nostrum’s Big Bore HPFP kit comes in.

✅ The Solution:

With 63% more fuel flow than stock, our Big Bore HPFP gives your engine the fueling capacity it craves — all without permanent changes to your engine bay. Install it, make power, and if needed, revert to stock with ease.

Want even more fueling headroom? Bundle it with Nostrum Stage 1 or Stage 2 Injectors for a complete, record-capable solution — and save while doing it!

💥 Ethanol-Ready Power

Ethanol blends like E40 or full E85 deliver more power thanks to their high octane and cooling effects. Our HPFP and injectors are fully E85 compatible, letting you tune safely without worrying about fuel system limitations.

🧰 What's Included:

• Nostrum Big Bore High Pressure Fuel Pump (HPFP)

• Optional: Stage 1 or Stage 2 High-Flow Injectors

• All required installation hardware

• OEM-quality fittings and seals

• Comprehensive printed installation guide

• Tuning data for professional calibrators

📈 Real Results:

One of our B58 sponsor vehicles achieved 653 WHP / 602 lb-ft on E40 using the Stage 2 Bundle — a true bolt-on monster.

📦 Vehicle Compatibility:

• 1-Series: F20/F21 140i / 140xi (2014–2019)*

• 2-Series: F22/F23 240i / 240xi (2015–2017)*

• 3-Series: F30/F31/F34 340i / 340xi (2016–2018, NA)

• 4-Series: F32/F33/F36 440i / 440xi (2016–2020, NA)

• 5-Series: G30/G31 540i / 540xi (2016–2019, NA)

• 6-Series: G32 640i GT (2016–2019, NA)

*ROW (Rest of World) customers — please contact us to confirm compatibility.

❗ FAQs

Q: Is this compatible with B58 Gen 2 engines (e.g. A90 Supra)?
No. Gen 2 uses a 350 bar system vs. Gen 1’s 250 bar. This kit is only for Gen 1 B58.

Q: Will it work with aftermarket camshafts?
The Big Bore HPFP is designed to work with OEM camshafts only. Compatibility with aftermarket cams is not guaranteed.

Q: Do I need additional tuning?
Yes. To take full advantage of the additional fuel capacity, professional tuning is required. Tuning data is available for your dealer or tuner.

🛡️ Backed by Confidence:

Every Nostrum part is backed by a limited lifetime warranty and supported by our team of calibration and install experts. From track cars to daily drivers, we're here to make sure your fuel system performs flawlessly.

Fuel the Future of Your B58 – with Nostrum.
More flow. More power. More reliability.