HKS 3 Layer Dry 200mm Green Replacement Filter Element

HKS Super Air Filter Honda Civic (FC1 / FK7) / Honda CR-V (RW1 / RW2)

HKS Nissan/Subaru Super Air Filter

HKS GTR Hybrid Filters

HKS 08-11 Subaru WRX / STI Drop-In Super Hybrid Filter

BBK Replacement High Flow Air Filter For BBK Cold Air Kit

Mishimoto Performance Air Filter - 3in Inlet / 7in Length

PERRIN 08-15 Subaru WRX/STi Repl 2.75in ID 11in Length Filter For PSP-INT-322/323/325/326 Intake Sys

ISR Performance Air Filter - N62 Z32 MAF (Bolt-On Style)

ISR Performance Universal Air Filter 3in Inlet (Clamp Style)

PERRIN 08-21 Subaru WRX / 08-18 STI / 09-18 Forester / 13-17 Crosstrek Drop-In Filter Foam - Black

Mishimoto Performance Air Filter - 2.75in Inlet / 7in Filter Length

PERRIN 2-Piece Replacement Filter for PERRIN Intakes 3.125 inch ID (Fits Big MAF and V2 standard In

PERRIN Subaru BRZ/Scion FR-S Cone Filter w/3.125in Mouth (For Intakes INT-330/-333/-334/-335)

PERRIN 19-21 Subaru STI (Inc. Type RA) Drop-In Panel Filter - Black

PERRIN 22-26 Subaru WRX / 18-25 Crosstrek / 17-25 Impreza / 20-25 Outback Drop-In Panel Filter

Mishimoto Performance Air Filter - 3in Inlet / 6in Length

AWE Tuning S-FLO Breather Filter VW/Audi 2.0T

Mishimoto Performance Air Filter - 4in Inlet / 7in Length

Mishimoto Performance Air Filter - 3in Inlet / 5in Length

PERRIN 13-20 Subaru BRZ / Scion FR-S / Toyota 86 Drop-In Panel Filter - Black

Mishimoto Performance Air Filter - 3.86in Inlet / 7.2in Length w/ Inlet Stack

Mishimoto Universal fit, Performance Air Filter, 2.75In Inlet, 6In filter length Red

AWE Tuning C7 3.0T / 4.0T S-FLO Filter

AWE Tuning B8 3.0T S-FLO Filter