Air Filters

These are replacement filters for our ETS Focus RS Intake Kit. These oiled-cloth reusable filters are designed specifically for our intake kits! (SP-3717)

These are replacement filters for our ETS Evolution 8/9 4" Turbo Kit Intake. These K&N filters are designed specifically for our intake kits! (SP-3605)

These are replacement filters for our ETS 2015+ Subaru STI Intake Kit. These K&N filters are designed specifically for our intake kits! This filter will replace both the stock MAF Intake Filter as well as the Speed Density Intake Filter (SP-3606)

Select your intake configuration above from either Speed Density or Stock MAF to select the correct replacement filter for your 04-21 STI Turbo Kit Intake.

These are replacement filters for our ETS 2015-2022 WRX Intake Kit. These K&N filters are designed specifically for our intake kits! (SP-3603)