S58 OEM Direct Injector (B58 Gen2 30% Flow Upgrade)

S58 OEM Direct Injector (B58 Gen2 30% Flow Upgrade)

by Bosch – Genuine BMW Injector Upgrade

Unlock your B58 Gen 2’s full fueling potential with the OEM BMW S58 Direct Injectors by Bosch — a proven 30% flow increase over the factory B58 Gen2 injectors. Originally equipped on the G8X M3/M4’s twin-turbo S58 engine, these injectors are the go-to upgrade for enthusiasts pushing higher horsepower levels into the 700whp range on upgraded turbos or ethanol-based fuels.

Engineered and manufactured by Bosch, the same supplier behind BMW’s OEM fueling systems, the S58 injectors deliver factory reliability with race-level flow. This makes them ideal for builds running high boost pressures, E30–E85 blends, or full hybrid turbo setups on the B58 Gen2 platform.

Key Features:

• ✅ Genuine OEM BMW / Bosch S58 Injectors

• 🚀 ~30% increase in flow over stock B58 Gen2 injectors

• 💧 Supports E30–E85 fuel blends and high-boost applications

• 🧩 Direct fit upgrade — no modifications required

• ⚙️ Perfect for hybrid turbo, big turbo, or flex-fuel builds

• 🏁 Maintains OEM reliability and cold start performance

Recommended For:

• B58 Gen2 engines exceeding 500–600+ WHP

• Vehicles using upgraded turbos or ethanol tuning

• Tuners seeking headroom for future power increases

• Gen2 B58's Using upgraded High Pressure Fuel Pumps

Fitment List (B58 Gen2 Models):

• 2019+ Toyota Supra (A90/A91) 3.0L

• 2020+ BMW M340i (G20 / G21)

• 2020+ BMW M440i (G22 / G23 / G26)

• 2021+ BMW 540i (G30)

• 2021+ BMW 740i / 740Li (G11 / G12)

• 2021+ BMW X3 M40i (G01 LCI)

• 2021+ BMW X4 M40i (G02 LCI)

• 2022+ BMW X5 xDrive40i (G05)

• 2022+ BMW X6 xDrive40i (G06)

• 2022+ BMW Z4 M40i (G29)

• All S58 Vehicles (x3M, X4M, G80, G82, G83)

Compatibility Notes:

• Designed for S58 and B58 Gen2 engines only

• Requires ECU recalibration/tuning to take advantage of increased flow (MHD Offers a box to easily check for this option in the tune)

• Sold individually (6 required per engine)

OEM BMW Part Number 13538671991

BOSCH Part Number 0261500502