Originally Posted by st falcon
It is direct injection and has a cleaner (more efficient/complete burn) as you likely know...but I think the first guess is correct, or at least a part of it. If it were really burning that clean without a cat they would have saved the money and just deleted it for you.
Nice work here FB, glad to have the info!
I can't prove it, but others that have done tuning can. Cat is pretty much only needed for cold starts, once engine gets up to temp. it runs as clean as it's going to get unless there is a problem.
65 Racestang 2012 Focus SE HB Sport Pac 5 speed man. NewMission Cold Air, Custom 3" Magnaflow exhaust, Steeda Rear Sway Bar, Eibach sportline springs, Steeda STS, Axis wheels, Blox shift knob, Focus elecrtic RMM, Injected 93 Tune V1 176HP 152Torque