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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:
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✅ Genuine OEM BMW / Bosch S58 Injectors
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🚀 ~30% increase in flow over stock B58 Gen2 injectors
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💧 Supports E30–E85 fuel blends and high-boost applications
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🧩 Direct fit upgrade — no modifications required
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⚙️ Perfect for hybrid turbo, big turbo, or flex-fuel builds
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🏁 Maintains OEM reliability and cold start performance
Recommended For:
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B58 Gen2 engines exceeding 500–600+ WHP
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Vehicles using upgraded turbos or ethanol tuning
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Tuners seeking headroom for future power increases
- Gen2 B58's Using upgraded High Pressure Fuel Pumps
Fitment List (B58 Gen2 Models):
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2019+ Toyota Supra (A90/A91) 3.0L
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2020+ BMW M340i (G20 / G21)
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2020+ BMW M440i (G22 / G23 / G26)
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2021+ BMW 540i (G30)
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2021+ BMW 740i / 740Li (G11 / G12)
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2021+ BMW X3 M40i (G01 LCI)
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2021+ BMW X4 M40i (G02 LCI)
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2022+ BMW X5 xDrive40i (G05)
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2022+ BMW X6 xDrive40i (G06)
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2022+ BMW Z4 M40i (G29)
- All S58 Vehicles (x3M, X4M, G80, G82, G83)
Compatibility Notes:
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Designed for S58 and B58 Gen2 engines only
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Requires ECU recalibration/tuning to take advantage of increased flow (MHD Offers a box to easily check for this option in the tune)
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Sold individually (6 required per engine)
OEM BMW Part Number 13538671991
BOSCH Part Number 0261500502
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