TTFS XDI-35 High Pressure Fuel Pump (HPFP) Upgrade for BMW N55 Bolt-In Direct Injection Fuel Pump Kit, +36% Capacity, 200 Bar F22 F30 F32 F34 F36 F87 M2, M135i, M235i, 335i, 435i

TTFS XDI-35 Uprated Direct Injection Pump for BMW F-Series N55

Get the fueling headroom your tuned BMW deserves with the TTFS XDI-35 uprated direct injection pump. This genuine drop-in replacement is engineered to maintain stable rail pressure under load, deliver clean drivability and unlock safer calibrations on petrol and ethanol blends. With a 36 percent increase in geometric capacity over the factory unit and a rated 200 bar operating pressure, it is the dependable fueling solution for F-series N55 engines including M2, M135i, M235i, 335i and 435i.

We have installed and run this pump on our own cars and many customer builds. Feedback is consistently positive: stronger midrange, rock-solid fuel rail pressure at high rpm and stock-like cold starts when mapped correctly. If you are chasing reliable power on an N55 without compromises to everyday refinement, this is the DI pump to choose.

Why enthusiasts choose the XDI-35

• Extra fueling capacity for tuned N55 engines without resorting to complicated conversions
• Holds commanded rail pressure at higher boost and revs for consistent performance
• Supports safer lambda targets and more timing on petrol and E-blends
• Plug-in fitment with OEM-like behaviour for smooth idle and part throttle

Key benefits

• Direct-fit replacement for BMW F-series N55 fuel systems - no core exchange required
• Up to 500 whp on pump petrol when correctly calibrated
• Compatible with all known fuels and ethanol mixtures including E30, E50 and E85
• 36 percent larger geometric capacity than the stock pump for superior headroom
• Maintains up to 200 bar - 2900 psi rail pressure for dependable operation
• Seamless calibration support via Bootmod3 BM3, MHD or custom mapping
• Includes required hardware for a clean install and a flashing tool unless you specify otherwise

Technical data

• Maximum flow: 195 LPH at 7000 rpm
• Maximum rail pressure: 200 bar - 2900 psi
• Geometric capacity: 1.22 cc per stroke - OEM is 0.897 cc - plus 36 percent
• Fuel compatibility: all known petrol types and all ethanol blends

Vehicle compatibility

Designed for BMW F-series models with the N55 engine:

• F87 M2 N55
• F22 M235i
• F20 F21 M135i
• F30 F31 335i including F34 335i GT
• F32 F33 F36 435i

If you would like us to confirm fitment for your specific chassis or model year, get in touch and we will be happy to help.

Tuning and installation

• A base flash is required so the pump parameters are written to the factory DME
• Fully supported by Bootmod3 BM3, MHD and bespoke calibrations
• Flashing tool supplied unless you tell us you already have an alternative method

Professional fitting is available at MJ Modifications in Warwickshire. For an installation and mapping quote, email info@mjmodifications.co.uk.

What you receive

• TTFS XDI-35 direct injection pump assembly
• All necessary hardware for a straightforward plug-in install
• Flashing tool unless otherwise specified

Part numbers

• TTFS01
• TTFS02

Proven results with real-world use

Our team and customers have run the XDI-35 extensively with excellent outcomes on daily-driven and performance-focused N55 cars. Expect crisp throttle response, consistent fueling at high load and the confidence to make the most of your tune when calibrated correctly.

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