Precision Raceworks - B58 Upgraded Direct Injectors || Gen 1

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

True Plug-and-Play High-Flow DI Upgrade—No Port Injection Required

Precision Raceworks is proud to release the ultimate Direct Injection (DI) upgrade solution for the BMW B58 Gen 1 platform. Whether you're looking to maximize performance on pump gas or E85, our Stage 1 and Stage 2 injector kits provide a seamless upgrade—no need for secondary injection systems, messy methanol tanks, or auxiliary controllers.

These injectors retain OEM-level diagnostics, safety features, and engine management control, ensuring smooth drivability, consistent power delivery, and easier tuning.

Key Features (Both Stages):

• True Direct Fit – No harness adapters or spacers required

• OEM-Equivalent Spray Pattern – Ensures clean combustion, smooth idle, and reliable drivability

• Ethanol Compatible – Built for E85 and pump gas

• Full Injector Matching – Each injector is batch-tested both statically and dynamically

• Tuning Data & Install Support – Includes detailed instructions, plus tuning data available for your calibrator

• Backed by a Limited Lifetime Warranty

Stage 1 Injectors

Flow Rate: 14.1 g/s @ 100 bar
Flow Increase: +35% over stock
WHP Potential (Gasoline): Up to 780 WHP*
WHP Potential (E85): Up to 630 WHP*
Max Operating Pressure: 220 bar / 3200 psi

Stage 2 Injectors

Flow Rate: 17.3 g/s @ 100 bar
Flow Increase: +66% over stock
WHP Potential (Gasoline): Up to 880 WHP*
WHP Potential (E85): Up to 700 WHP*
Max Operating Pressure: 220 bar / 3200 psi

Why Spray Pattern Matters:

Bigger isn’t always better. A poorly designed injector can compromise idle quality, drivability, and increase engine wear due to fuel impingement on the cylinder walls. That’s why we’ve engineered our injectors to retain OEM-equivalent spray patterns for optimal atomization and combustion efficiency—even at high flow rates.

Frequently Asked Questions:

Q: Will these injectors work on B58 Gen 2 engines (e.g. A90 Supra)?
A: No. Gen 2 engines use a 450-bar fuel system. These injectors are specifically designed for the 250-bar Gen 1 B58 system.

Q: Are tuning changes required?
A: Yes. Calibration adjustments are necessary. Tuning data is provided to simplify the process for your tuner.

What's Included:

• (6) Precision Raceworks Stage 1 or Stage 2 Injectors (matched set)

• Proprietary seals and installation hardware

• Comprehensive installation guide

• Tuning guide available for your tuner

• Lifetime support and warranty