I'm new to the Subaru as well as boosted arena so please bear with my seemingly naive questions. Engine: 1998 WRX STI Version V RA 2.0L EJ207 (Completely stock internals) ECU: 6S Turbo: Stock VF28 Exhaust: 3'' Turboback 5zigen exhaust.
I currently have an aftermarket MBC (Halman) installed run...