We need to be careful and specific about the power changes with the downpipes. Yes, the car feels less torquey under part throttle. I was disappointed at first. At wide open throttle it's another story. If WOT frequently you'll love the difference from down low to redline. The sound with the downpipes is deeper and with a slight rumble. With long tube headers fed into the stock resonator and muffler you can set off car alarms if you try. My power gain with the downpipes was 11 hp at the wheels. Cutouts open on the downpipes was 16 hp. This was with no adjustments to the tune and stock exhaust from downpipes, later headers, back.

Les