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The K&N Typhoon cold air intake for 2018–2020 Subaru WRX STI H4‑2.5L is built around a mandrel‑bent aluminum intake tube and a washable, reusable High‑Flow oiled cotton air filter. K&N states the system is engineered to provide an increase in horsepower and torque while offering filter service intervals up to 100,000 miles under normal highway driving. A custom heat shield or air box protects inlet air from engine heat and typical installations take under 90 minutes; check CARB status for California legality.
K&N 2018 Subaru WRX STI H4-2.5L F/I Typhoon Performance Intake
