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Subaru WRX STI (2015–2021) Forced Induction FAQ's

Please read our FAQs page to find out more.

What’s the advantage of a stock‑location turbo upgrade on the STI?

It retains factory‑style fitment while flowing more air with updated wheels and housings, improving mid‑range and top‑end with proper fueling and tuning.

Will more boost alone make the STI faster reliably?

Short term gains are possible, but pair boost changes with intercooling, fueling, and ignition upgrades plus calibration for consistency and engine health.

How do I choose the right turbo for my STI goals?

Define target power, fuel type, and use case. Match compressor maps to desired spool and top‑end so drivability stays intact on the street.