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Subaru WRX STI (2015–2021) Intake & Intercooler FAQ's

Please read our FAQs page to find out more.

Does the 2015–2021 STI benefit more from a TMIC or FMIC?

A quality top‑mount keeps lag low and fits under the scoop; a front‑mount resists heat‑soak better in repeated pulls. Choose based on goals and climate.

Will an intake alone require tuning on the STI?

Many intakes need calibration to keep MAF scaling and trims in check. Pairing intake and intercooler with a tune maximizes repeatable gains.

How can I reduce heat‑soak on the STI’s top‑mount intercooler?

Use ducting that seals to the scoop, add heat shielding, and avoid heat‑soak in staging. Monitor intake temps during back‑to‑back runs.