CA5 Series - Suspension Shock AbsorberBilstein CA5 Series shock absorbers are designed specifically for custom street rod applications that require unique lengths and valve settings for the proper chassis setup. Built around a billet aluminum monotube design, these shock absorbers feature a 46mm piston, threaded body, 5 8 inch spherical rod end mounts and various lengths and valve settings to choose from. Each shock absorber is supplied with a hard anodized spring seat, lock ring, and hat