I Honestly dont know how it runs with out the ported blower. At the time, I was running TR6's. I have the Dyno sheet form Rick@ Amazon and it made 450+ HP and 520+ tqr with an 11.7 A/F. I am not sure if Rick locks his tunes but it is re-tunable. I had a Blank or "safe" mode, a race mode (never used) and a street mode.