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The Injen SP1208WB short‑ram intake in wrinkle black fits 2018–2021 Subaru WRX STI with the H4 2.5L turbo and replaces the factory airbox with mandrel‑bent 6061‑T6 aluminum plumbing and a serviceable SuperNano‑Web dry filter. It’s a drop‑in install with no additional tuning required, offers dyno‑proven gains, an aggressive intake tone, a fitted heat shield, and Injen’s limited lifetime warranty; not CARB exempt.
Injen 18-21 Subaru WRX STI H4-2.5L Turbo SP Aluminum Series Cold Air Intake - Wrinkle Black
