B58 Gen1 Upgraded DI Injectors, Precision

Precision Raceworks Stage 1 & Stage 2 Direct Injection Fuel Injectors – B58 Gen 1

Precision Raceworks introduces a complete upgrade solution for your B58 Gen 1 engine’s direct injection system – without the need for port injection! Whether you’re aiming for Stage 1 or Stage 2 power goals, these injectors offer a plug-and-play installation and OEM-like reliability.

No more external controllers, meth tanks, or complex wiring. These injectors integrate directly into the factory fuel rail and ECU management system, maintaining all safety diagnostics and engine protections.

Each kit includes detailed installation instructions, full injector tuning data for your tuner, and is backed by a limited lifetime warranty. Every injector is statically and dynamically tested to ensure perfect batch matching and consistent performance.

Stage 1 Highlights:

• 35% more flow than stock B58 Gen 1 injectors
• Direct fit – no harnesses or spacers required
• Ethanol compatible
• OEM-equivalent spray pattern for smooth drivability
• Max Operating Pressure: 220 bar / 3200 psi
• Flow Rate: 14.1 g/s @ 100 bar
• WHP Potential – Gasoline: 780 WHP*
• WHP Potential – E85: 630 WHP*
• Tune Required: Yes

Stage 2 Highlights:

• 66% more flow than stock B58 Gen 1 injectors
• Direct fit – no harnesses or spacers required
• Ethanol compatible
• OEM-equivalent spray pattern for smooth drivability
• Max Operating Pressure: 220 bar / 3200 psi
• Flow Rate: 17.3 g/s @ 100 bar
• WHP Potential – Gasoline: 880 WHP*
• WHP Potential – E85: 700 WHP*
• Tune Required: Yes

Why OEM Spray Pattern Matters

Larger flow capacity is just part of the story. Poor spray patterns can cause idle issues, misfires, knocking, poor fuel atomization, and even engine wear. Precision Raceworks injectors maintain factory-like spray geometry for safe and consistent performance across the entire rev range.

Compatibility:

• BMW 340i / 340i xDrive (2016–2019)
• BMW 440i / 440i xDrive (2017–2020)
• BMW 540i / 540i xDrive (2017–2019)
• BMW 640i xDrive (2018–2019)
• BMW 740i / 740i xDrive (2016–2019)
• BMW M240i / M240i xDrive (2017–2021)
• BMW X3 M40i xDrive (2018–2019)
• BMW X4 M40i xDrive (2018–2019)

*Power estimates may vary based on supporting modifications and fuel type.