Collection: STI - Air Intake Systems/Filters

K&N 05-08 LGT / 08-11 WRX / STi Drop In Air Filter

K&N Universal Rubber Filter 5in Flange ID x 6.5in Base OD x 4.5in Top OD x 4.125in Height

K&N 2018 Subaru WRX STI H4-2.5L F/I Typhoon Performance Intake

K&N Unique Custom Air Filter Tapered Conical 170mm Base OD x 60mm Top OD x 124mm Height

K&N 2019 Subaru WRX STI 2.5L F/I Replacement Air Filter

K&N Cone Filter 5in ID 6.5in base 4.5in top 5.625in height carbon fiber look

K&N 09-18 Subaru Forester 2.5L H4 F/I Cabin Air Filter

K&N Filter Universal Rubber Filter 2 3/4 inch Flange 6 inch Base 5 inch Top 6 1/2 inch Height