Found a NAIAS section on gm.com which has some videos of the Sky. The first one has sound of it to driving by on the road. Definetely sounds a lot meatier then a normal stock i4.
- Click "VehiclesComing" [2nd form last in the flash navigation in the midle of the page]
- Click "2007 Saturn Sky"
- Click "Videos" it's the first one that auto plays