Insulator. Spring.
Coil Spring Insulator. Coil. Dust cover. Retainer. Seat. Strut.

Coil Spring Insulator

Fits CTS (2014 - 2015)

ATS; w/o Sport Suspension. ATS; w/o V-Series; w/o Sport Suspension. COUPE, W/AWD. Coupe, W/O AWD, W/O V, W/O FE3 SPORT SUSPENSION. Sedan, W/AWD. SEDAN, W/O AWD, W/O V, W/O FE3 SPORT SUSPENSION. W/AWD. W/O AWD, W/O V, W/O FE3 SPORT SUSPENSION.
Suspension Coil Spring - Repair or Replace
Your coil springs are not especially prone to failure, but if they have been cut, clamped, or heated to have the vehicle lowered, your Cadillac CTS might benefit from replacing the strut springs. Excessive rust can make the springs more prone to failure. Contact your local Cadillac service department to have your suspension system evaluated.