aFe Magnum FORCE Intake Replacement Air Filter w/ Pro DRY S Media (21-91039) FITMENT_TOURING_SPORT Professional installation is recommended to

Professional installation is recommended to maintain product integrity and function

trust the cooling experts at CSF for the best performing

Si 2011 Honda Civic Si

Expect a louder and deeper exhaust note than the factory system

aFe Magnum FORCE Intake Replacement Air Filter w/ Pro DRY S Media (21-91039) FITMENT_TOURING_SPORT Professional installation is recommended toMagnum Flow Pro Dry S Round Tapered Gray Air Filter (21 91039) by aFe. This high flow Pro DRY S air filters are constructed with 100% polyurethane on all sides and will out flow the stock paper filters for improved performance. Layers of progressively finer synthetic media provides maximum convenience and can be cleaned with soap and water. Washable and reusable for multiple cleaning cycles, the tall, open and evenly spaced filter pleats provide