This is an optional Competition Suspension Mugen 86mm Rear Shock Spring Set. These springs feature 10.50 turns of 1.6mm wire, and are 3.9 rate. Manufactured using the highest quality materials available, CSI High Performance Racing Springs have been preset and shot peened for high strength, consistency and long life. Shot Peening is a method used to increase fatigue life by impacting the surface of the spring with small shot of uniform media with a force sufficient to create plastic deformation. All CSI High Performance Racing Springs are powder coated Black and are clearly marked with the free length of the spring and spring rate for quick and easy identification. They are compatible with the standard kit shocks, as well as the CSI Pro Clicker Series shocks.
- 10.75 turns of 1.6mm wire - 3.9 rate, Soft
- Preset and shot peened for high strength, consistency and long life
- Manufacturered using methods used in F1, Indy Car, NASCAR and NHRA
- Powder coated black
- Marked with the length of the spring and spring rate for quick and easy identification