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The Injen SP1208WR short‑ram intake in wrinkle red is engineered for 2018–2021 Subaru WRX STI with the H4 2.5L turbo, replacing the factory airbox with a smooth 6061‑T6 aluminum intake path and a reusable SuperNano‑Web dry filter. It installs as a drop‑in with no tuning required, delivers reported dyno gains, includes a vehicle‑specific heat shield, and carries 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 Red
