GrimmSpeed 2022 WRX - 3" Catback Exhaust + DryCon Panel Air Filter

Stock Tune 93 Octane vs. JB4 Stage 1 93+ Tune vs. Accessport Stage 1 93 Tune

Results from Dyno Dynamics Dyno which can read 15-20% lower than other dynos
Source: GrimmSpeeed + JM Automotive