Spool Stage 1 IFX350 Direct-Injection Injectors +30% – BMW B58 Gen 2
Spool Stage 1 IFX350 Direct-Injection Injectors +30% – BMW B58 Gen 2
Spool Stage 1 IFX350 Direct-Injection Injectors +30% – BMW B58 Gen 2 is a Spool Performance upgraded direct-injection injector set for high-output BMW applications while retaining factory-style direct-injection control.
- 30% more flow than stock injectors
- Operating capability: up to 390 bar
- Tuning/calibration changes are required
- Designed to retain controlled idle and low-load behaviour appropriate to the application
Fitment: BMW B58 Gen 2 applications including M340i and M440i listed by Spool; M240i routing is retained only where B58 Gen 2 fitment is confirmed by the M Lab finder.
Important: fuel-system capacity and calibration must be matched to the complete engine combination. M Lab can assist with BMW-specific installation and calibration planning.
Dispatch: Special order — allow 2–3 weeks.
Confirmed catalogue fitment
- Engine families: B58
- BMW chassis: G20, G21, G22, G23, G26, G42, G43
- Vehicle models: M240i, M340i, M440i
Fuel-system selection and installation
Fuel-system parts must be selected around the complete combination of engine generation, fuel type, target output, existing pump and injector configuration, and the calibration strategy. A component appearing for an engine family does not mean it replaces every factory or upgraded fuel-system arrangement used on that engine.
Professional installation and calibration are recommended where the product changes fuel pressure, pump control, injector flow, ethanol-content input or port-injection operation. Confirm wiring, plumbing, electrical load, controller requirements and compatible supporting hardware before ordering.
Before ordering
Select your exact BMW through MLAB My Garage and review the product options, included parts and installation requirements. Where a vehicle has been modified from its original engine, transmission or fuel-system specification, contact MLAB with the VIN and current hardware list so the combination can be checked before supply.
MLAB support
MLAB by Boost and Tune can assist with product selection, workshop installation and dyno calibration for supported BMW applications in Melbourne. Product availability and lead time should be confirmed when ordering supplier-built or special-order components.
Supplier specification & ordering notes
- Supplier-stated flow increase: 30% relative to the stated original injector reference.
- Supplier-stated pressure capability: up to 390 bar. This is not an instruction to raise rail pressure.
- Calibration changes are required for these injectors. Arrange tuning for the exact injector model and engine generation before installation.
- The supplier lists a one-year manufacturer warranty, subject to its terms.
Chassis: G20, G21, G22, G23, G26, G42, G43
Engines: B58
View compatible BMW ranges
M240i, M340i, M440i
View full year and variant fitment
PROFESSIONAL FITTING AVAILABLE
Need M Lab by Boost & Tune to install this?
Have this part professionally fitted, checked and configured by our BMW performance workshop.
Product: Spool Stage 1 IFX350 Direct-Injection Injectors +30% – BMW B58 Gen 2
Workshop installation in Albion, Victoria
Vehicle compatibility
Fits these BMW platforms
Select a BMW in My Garage to check this product.
Use the BMW vehicle selector and confirm VIN, model year, drivetrain, steering side and factory options before ordering.
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