Clearance from the top of tires at the center of their tread width, straight up to the inner fender lining. Stock '03 GT vert, fuel tank 3/4 full.
Front 5 inches. Rear 5.5 inches.
I just got on hands and knees to look. I can't see a manufacturer name printed on the spring, but I found the ID number 68491D on the right rear spring. The spring is black in colour.