Spool Performance
Spool Performance FX-150 High-Pressure Fuel Pump (HPFP) Upgrade Kit for BMW S55:
Spool Performance FX-150 High-Pressure Fuel Pump (HPFP) Upgrade Kit for BMW S55:
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FX-150 direct injection pump kit for BMW S55 | M2 Competition, M3, M4
Unlock dependable fuelling headroom on the S55 twin turbo straight six. The Spool Performance FX-150 delivers roughly 50 percent more high-side flow than the factory units, supports higher ethanol content, and keeps fuel rail pressure rock solid under boost. Completely plug and play with OEM lines and connectors, this ethanol-ready upgrade is ideal for hybrid turbos and big power builds seeking consistent injection pressure and reliable cold starts.
We run this kit on our own S55 projects and customer cars, and the results speak for themselves: smoother starts, stable pressure at wide open throttle, and the confidence to push for more torque with proper calibration. If you are searching for a BMW S55 fuel system upgrade, M2 Competition fuelling solution, F80 M3 fuel rail pump, or F82/F83 M4 DI pump kit compatible with E85 blends, this is the proven choice.
Key highlights
- Approximately 50 percent increase in direct injection pump flow over stock
- Ethanol compatible for higher blend ratios including E50 to E85 when tuned
- Direct fit installation with factory-style connections, no cutting or splicing
- Designed to support larger turbochargers with stable rail pressure at load
- Improved consistency for flex fuel setups and high boost calibrations
Why your S55 benefits from this fuelling upgrade
On tuned S55 engines the OEM pump arrangement can become a restriction, causing rail pressure drop at higher mass flow and ethanol content. The FX-150 increases available high-pressure volume, giving tuners the headroom needed to run more timing, more boost, and higher ethanol blends with stable commanded pressure. Expect stronger midrange, reliable top-end fuelling, and cleaner drivability when mapped correctly.
Included hardware
- 2 x FX-150 upgraded direct injection pumps
- 1 x Ethanol Content Monitor with Bluetooth app connectivity
- 1 x Bosch-spec 10 micron high-flow fuel filter
- Upgraded fuel lines plus required installation hardware
Filter and ethanol monitoring
10 micron filtration: Bosch-spec high-flow element to protect injectors and the high-pressure system with minimal restriction to the low side.
Ethanol Content Monitor: View in-tank ethanol percentage and fuel temperature via the SPOOL Ethanol Content Analyzer mobile app over BLE 4.0. Supplied braided steel, nylon core lines are fully E85 compatible for long-term durability.
Tuning and setup
Calibration changes are required after installation. Spool Performance can provide guidance for your existing calibrator or connect you with tuners experienced with these pumps. Always verify rail pressure targets and lambda during commissioning, especially on ethanol blends.
Vehicle fitment
- BMW M Series F87 LCI M2 Competition S55 (2018+)
- BMW M Series F87 LCI M2 CS S55 (2020+)
- BMW M Series F80 M3 Saloon S55 (2012-2015)
- BMW M Series F80 LCI M3 Saloon S55 (2015-2018)
- BMW M Series F82 M4 Coupe S55 (2013-2017)
- BMW M Series F82 M4 GTS Coupe S55 (2013-2017)
- BMW M Series F82 LCI M4 Coupe S55 (2016-2019)
- BMW M Series F82 LCI M4 CS Coupe S55 (2016-2019)
- BMW M Series F83 M4 Convertible S55 (2013-2017)
- BMW M Series F83 LCI M4 Convertible S55 (2016-2019)
Professional fitting in Warwickshire
For expert installation and post-fit calibration support, book with MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.
Compatibility check before dispatch
To ensure the correct kit is supplied, please provide your UK registration or the last 7 digits of your VIN at checkout so we can verify fitment.
Part number
SP-FX-S55
Manufactured by
Spool Performance
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