Progressive Suspension Standard 13 Series Black Shock Springs, 03-1322B Colors:Black Height: 13

Height: 13

Mustang seats support the full width of the rider and passenger buckets

Full systems include R-77 muffler

Low collar design

Progressive Suspension Standard 13 Series Black Shock Springs, 03-1322B Colors:Black Height: 13Progressive Suspension Standard 13 Series Black Shock Springs, 03 1322B Coil Over Spring Inside Diameter (in): 1. 550 in. Coil Over Spring Inside Diameter (mm): 39. 37mm Coil Over Spring Length (in): 12. 000 in. Coil Over Spring Length (mm): 304. 80mm Progressive Rate Spring: Yes Coil Over Spring Rate (lbs in): 75 155 lbs. in. These springs utilize a progressively wound design that allows them to soak up small bumps, while absorbing the big ones.