[WayFast84]

I want to keep the 2.5 catback to keep it of sleeper nature, my problem is the motor itself should be producing a healthy 400-500 hp on-off the spray. Should I keep the shorty headers, and have 2 manual 2.5 cut outs? 1 2.5 cut out? get long tubes, make a y pipe with an x pipe in it then cut outs then into a cat and back? money is a factor, so Is visual inspection.