B48TU / B58TU High Flow Injector Upgrade (30% More Flow) – OEM BMW S58 Injector

B48TU / B58TU High Flow Injector Upgrade

(OEM BMW S58 Injector – Part #13538671991)

Upgrade your fueling system with the OEM BMW S58 High Flow Direct Injector, the highest-flowing injector available in the Bosch HDEV6 injector family. Originally equipped on the BMW S58 engine, these injectors provide approximately 30–33% more fuel flow than the factory B58TU injectors while maintaining the factory spray pattern, idle quality, and OEM reliability.

These injectors are a direct mechanical fit for B46TU, B48TU, and B58TU engines, making them the ideal fueling upgrade for higher horsepower builds running upgraded turbos, ethanol blends, or increased boost pressure.

For S58 owners, these are the genuine OEM replacement injectors. For B58TU and B48TU owners, they provide one of the best fueling upgrades available while retaining factory drivability.

Price is for one (4 or 6) injectors. You select the quantity.  

Product Features

• Genuine OEM BMW / Bosch S58 Injector
• BMW Part Number: 13538671991 (BOSCH Part Number 0261500502)
• Approximately 30–33% more fuel flow than factory B58TU injectors
• OEM Bosch HDEV6 direct injection technology
• Maintains factory spray pattern and atomization
• Direct replacement for S58 engines
• Direct fit upgrade for Gen 2 B48TU & B58TU engines
• Excellent OEM reliability and drivability

Performance Benefits

• Supports significantly higher horsepower applications
• Ideal for ethanol blends including E30, E50, and higher (with proper supporting modifications)
• Maintains excellent idle quality and cold-start performance
• Perfect upgrade when paired with upgraded high-pressure fuel pumps
• Excellent choice for both street and track vehicles

Fitment

Direct OEM Replacement

BMW S58

• G87 M2 — 2023–Present
• G80 M3 — 2021–Present
• G81 M3 Touring — 2023–Present
• G82 M4 Coupe — 2021–Present
• G83 M4 Convertible — 2021–Present
• F97 X3M — 2020–2024
• F98 X4M — 2020–2024

Direct Upgrade (Gen 2 B58TU)

• Toyota GR Supra (A90/A91) — 2021–Present
• BMW G29 Z4 M40i
• BMW G42/G43 M240i / M240i xDrive
• BMW G20/G21 M340i / M340i xDrive
• BMW G22/G23/G26 M440i / M440i xDrive
• BMW G30/G31 540i / 540i xDrive*
• BMW G32 640i GT*
• BMW G11/G12 740i / 740i xDrive*
• BMW G15/G16 840i / 840i xDrive
• BMW G05 X5 40i
• BMW G06 X6 40i
• BMW G07 X7 40i
• BMW G01 X3 M40i*
• BMW G02 X4 M40i*
  

Direct Upgrade (B46TU / B48TU)

Compatible with Gen 2 B46TU & B48TU engines, including:

• BMW G20 330i / 330i xDrive — 2019–Present
• BMW G21 330i Touring — 2019–Present
• BMW G22 430i Coupe — 2021–Present
• BMW G23 430i Convertible — 2021–Present
• BMW G26 430i Gran Coupe — 2022–Present
• BMW G42 230i Coupe — 2022–Present
• BMW G43 230i Gran Coupe — 2025–Present
• BMW G01 X3 30i — 2020–Present
• BMW G02 X4 30i — 2020–Present
• BMW G05 X5 xDrive40i (B48 regional applications) — where equipped
• BMW G06 X6 xDrive40i (B48 regional applications) — where equipped
• BMW G07 X7 xDrive40i (B48 regional applications) — where equipped
• BMW G29 Z4 30i — 2019–Present

*Only vehicles equipped with the Gen 2 B58TU engine.

Direct Upgrade (B48TU)

Compatible with B46TU and B48TU equipped BMW models.

Important Notes

• Sold individually (Quantity of 1).
• Not compatible with Gen 1 B46, B48, or B58 engines.
• These injectors are designed for B46TU, B48TU, B58TU, and S58 engines only.
• Please verify your engine generation before ordering.

Tuning Information

• B58TU / B48TU: A tune is required to properly utilize these injectors. Most Bootmod3 (BM3) and MHD calibrations include injector scaling options, allowing these injectors to be configured without requiring a fully custom tune.
• S58: These are genuine OEM replacement injectors and require no injector-related calibration changes when replacing factory injectors.

Availability

This product is in stock and ready to ship.

Installation

Professional installation is recommended. Injector coding and proper calibration should be completed after installation when required. For B58TU and B48TU applications, verify your tuning software is configured for S58 injectors before operating the vehicle.