A90/ A91 Supra IFX350 Gen2 B58 upgraded DI injectors Stage 1 +30%

So you bought a Supra with a B58, installed a tune, maybe a downpipe… and now your logs look like the stock injectors are filing a formal complaint with HR.

Meet the solution: Spool Performance IFX350 Stage 1 DI Injectors.

These are for Supra owners who have discovered the unfortunate truth about Gen 2 B58 fueling:
the factory injectors are great… right up until the moment you actually try to make power.

The IFX350 injectors flow about 30% more fuel than stock, giving your tuner the headroom needed for higher boost, ethanol blends, and builds that involve phrases like “just one more dyno pull.”

And before you ask:
Yes, they’re designed to behave nicely during normal driving so your Supra doesn’t idle like a 1990s drag car while you’re picking up groceries.

Basically:

• Your turbo gets the fuel it wants

• Your tuner stops yelling about injector duty cycle

• And your Supra can finally live the boosted life Toyota engineers were trying to prevent.

Real Specs (Actual Numbers, Not Instagram Horsepower)

• +30% fuel flow over stock Gen 2 B58 injectors

• Supports up to ~390 bar fuel pressure

• Maintains stock-like idle and drivability

• Designed for high load / high RPM fueling demands

• Works with major Gen 2 B58 tuning platforms (tune required)

• Tested on multiple high-power B58 builds

• 1-year manufacturer warranty

Ideal For

• A90 / A91 Toyota Supra B58 builds

• Higher boost tunes

• Ethanol blends (E30–E50 typical setups)

• Big turbo upgrades

• People who say “this is the last mod” every month