I just looked and measured the space between my headers and the car. 1/2" or more clearance at the closest part (that bolt which is actually below the headers level) and I can fit my finger between it. The picture looks close because of the angle, but there is plenty of clearance and I haven't...
The motor mounts are made with Polyurethane Bushings and aluminum spacers. They reduce Engine movement (deflection) so they so add some vibration because the stock motor mounts are soft and were made for comfort. These are adjustable, stock height, 1/4" drop or 1/2" drop. Stock height with the...
Your problem isn't with the headers, its the OEM motor mounts. They sag... I installed BMR's adjustable motor mounts along with my SW LT's so that the motor wouldn't sag and cause rubbing with those garbage OEM motor mounts. I suggest upgrading them, my LT's aren't close to rubbing at all. $120...