So would this be a useful addition to my 04 STi. Fairly stock, with coated stock exhaust manifolds, Cobb uppipe (also coated), TXS turboback (full 3"), Perrin inlet pipe, K&N Typhoon intake, CoolingMist Alky/water injection, running both Cobb AP and UTEC engine management? Car daily driven with lots of AX action. I also assume that running the GM BCS would be OK for BSP class?
I read earlier in this thread that this was not needed on the 04 models, or as long as the stock restrictor is left in the vacuum line. I also assume that the UTEC ABC would not be used in conjunction with the GM BCS.