It is NOT OK to bolt onto a car with a custom tuned ECU vehicle. We get countless requests for CARB approved intakes and have now made the jump. The first PERRIN Performance intake to get CARB approval will be for the 2008-2014 WRX and STI.
Perrin Performance PSP-INT-325NY Cold Air Intake - Neon Yellow For Subaru WRX
Perrin Performance PSP-INT-323RD Cold Air Intake - Red For 2016-2017 Subaru STI
Perrin Performance PSP-INT-326RD Cold Air Intake - Red For 2018-2021 Subaru STI
Perrin Performance Cold Air Intake For 2017-21 Subaru BRZ/86 (PSP-INT-334BK)
Perrin Performance PSP-INT-330RD Cold Air Intake
Perrin Performance PSP-INT-335BK Cold Air Intake - Black For 22-25 BRZ and GR86