A90/ A91 Supra IFX350-X Gen2 B58 upgraded DI injectors Stage 2 +60%

Spool Performance A90 / A91 Supra IFX350-X Gen2 B58 Upgraded DI Injectors – Stage 2 +60

At some point during a B58 build, reality sets in.

The turbo is bigger.
The ethanol content is higher.
The boost number in your tune file looks like a typo that somehow made the car faster.

And suddenly the factory injectors are doing the mechanical equivalent of whispering:
“I’m giving it everything I’ve got, captain.”

That’s where the Spool Performance IFX350-X Stage 2 +60 DI Injectors come in.

These are designed for Gen2 B58 builds that have officially moved past “bolt-ons and optimism” and into “this thing might actually make serious power” territory. With about 60% more flow than stock, they provide the fueling capacity needed for big turbo setups, ethanol blends, and horsepower numbers that make traction control file a complaint.

Even better, they’re engineered to keep stock-like idle and drivability despite the massive increase in fuel delivery. So your Supra can behave politely at stoplights while still being capable of absolute violence at wide-open throttle.

Because when your turbo is moving hurricane levels of air, the fuel system should probably show up to work too.

Why Upgrade Your Injectors

+60% Fuel Flow Over Stock
Built to supply the fuel your engine actually needs once the boost starts getting irresponsible.

Designed for High Load & High RPM Builds
Ideal for aggressive tuning, larger turbos, and ethanol fuels like E85.

Maintains Stock-Like Idle
Despite the increased capacity, the injectors are sized to preserve smooth idle and low-load drivability.

Handles Serious Fuel Pressure
Capable of operating at up to ~390 bar, making them ready for high-performance fueling systems.

Because Running Out of Fuel Mid-Pull Is Bad for Your Engine… and Your Ego

Key Features

Stage 2 IFX350-X upgraded direct injection injectors
Approximately +60% flow increase over factory injectors
Capable of operating at up to ~390 bar fuel pressure
Designed specifically for Gen2 B58 engines
Maintains OEM-like idle and drivability
Requires tuning changes for proper operation
Backed by a 1-year warranty

Vehicle Compatibility

Designed for Gen2 BMW B58 engines, including:

Toyota A90 / A91 Supra 3.0
BMW M340i
BMW M440i
BMW Z4 M40i
BMW X3 M40i / X4 M40i

(Always verify fitment and required supporting modifications.)

Octane Garage Note

These injectors won’t magically make your car faster.

They simply remove one of the many reasons your fuel system had for holding your turbo back.