The K&N Typhoon short-ram intake for 2002–2005 Honda Civic Si (L4‑2.0L) replaces the restrictive factory intake with a mandrel-bent aluminum tube and an oversized cone filter to reduce airflow restriction and deliver a guaranteed power gain. It comes with a washable, reusable black-rubber topped K&N high-flow air filter rated for up to 100,000 miles between services under normal highway driving, and it accommodates factory sensors and vent hoses. The Typhoon installs relatively easily, usually within about 90 minutes; check CARB status for your vehicle.
K&N 02 Honda Civic Si Polished Typhoon Short Ram Intake