I am making my pipes custom to fit my electronic exhaust cutouts....(control backpressure for the turbo). E-manage ultimate will take care of the 02 sensor readings. I've seen a red 6th gen with a roots-type blower....a company called comptech (no longer exist). I think he ended somewhere around 250hp...(bad memory). But starting at 250 for 7gens, this platform can hold 400hp on a T3 under 7-8lbs. I haven't seen it yet, but someone's gotta do it!