Xtreme-DI XDI Upgraded BMW B58 Gen 1 +75% Injector Set for M140i, M240i, 340i, 440i, 540i, 740i, X3 M40i, X4 M40i
Upgrade your BMW B58 Gen 1 fuel system with the Xtreme-DI XDI +75 percent Bosch injector set. This is the go-to BMW B58 injector upgrade for M140i and M240i owners, as well as 340i, 440i, 540i, 740i, X3 M40i and X4 M40i drivers who need reliable, high-flow direct injectors that deliver OEM-like drivability with serious performance headroom. These XDI B58 injectors flow approximately 75 percent more than stock and are precision matched for stable idle, smooth part-throttle and strong wide open throttle performance at up to 250 bar rail pressure.
We have fitted and used these XDI B58 injectors on our own builds and for many Nforcd customers. Feedback has been excellent for drivability, consistency and tuning results. If you are targeting higher power on your B58 Gen 1, these injectors are a proven foundation for a robust fuel system upgrade.
Why choose XDI B58 upgraded injectors
- +75 percent flow over stock B58 direct injectors for significant fuel headroom
- Matched in sets within a 0.5 percent spread for superb idle stability and cylinder balance
- Brilliant performance at 250 bar rail pressure for reliable high load operation
- Drop-in fitment with OEM connectors and seals, no wiring adaptations or piggybacks required
- Bosch-based injector sets engineered by Xtreme-DI for the BMW B58 Gen 1
Tested, matched and documented
Every XDI injector set is flow-tested and matched at three operating points and supplied with full documentation:
- 0.8 ms at 20 bar for idle stability
- 10 ms at 100 bar for static flow reference
- 6 ms at 200 bar for wide open throttle performance and stability
Maximum rail pressure: 250 bar / 3600 psi.
Compatibility - BMW B58 Gen 1 applications
- F20/F21 - M140i, M140xi
- F22/F23 - M240i, M240xi
- F30/F31/F34 - 340i, 340xi
- F32/F33/F36 - 440i, 440xi
- G30/G31 - 540i, 540xi (up to 2019 MY)
- G32 - 640i, 640xi (up to 2019 MY)
- G11/G12 - 740i, 740xi (up to 2019 MY)
- G01 - X3 M40i (up to 2019 MY)
- G02 - X4 M40i (up to 2019 MY)
Note: Not compatible with B58 TU engines. Please confirm your engine is B58 Gen 1 before ordering.
Tuning and calibration
These upgraded BMW B58 injectors require tuning changes after installation. At the time of writing, XDI note they are working on MHD and BM3 support. ECUtek and WinOLS are reported to work fine. Always consult your calibrator to ensure correct injector data is applied.
Installation and support
Direct fitment with no wiring changes makes these a straightforward injector upgrade for the B58 Gen 1 platform. For professional fitting and mapping support, Nforcd offer installation services in Warwickshire. Request a fitting quote at Sales@nforcd.com.
Who is this injector upgrade for
If you are pushing beyond the limits of the stock B58 injectors, running higher boost, larger turbos or seeking more reliable fuel delivery at elevated rail pressures, the XDI +75 percent Bosch injector set is an ideal solution. It maintains OEM refinement while unlocking the fuel flow required for serious performance on the B58 Gen 1.
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