Magnum Series Rear Coil-Over Shock Absorber Competition Engineering's Rear Coil-Over Shocks are a part of our Magnum Series, a line of professional-grade products engineered for maximum performance and durability. They feature 12 settings, allowing you to tune the suspension from soft to firm with a simple turn of the knob. All-Aluminium billet housing is CNC machined with a black anodized body Spring seats are adjustable for preload and accept 2-1/2 I.D. springs 5/8 hardened chrome piston rod provides superior strength Advanced sealing reduces drag for faster reaction Includes two 1 wide spherical mounting bearings with locking snap rings 17 extended height; 13-3/4 to 14-5/8 recommended ride height; 11-3/4 compressed height One per package Springs not included