The QA1 27 Series shocks feature easy, bolt-in installation and are available in all popular stock mount options for multiple classes of Circle Track racing. These shocks feature an electroless nickel plated monotube body that completely seals out elements. This provides you with the best corrosion resistance, superior hardness and lubricity. The 27 Series is completely racer rebuildable and revalveable, so there is no need to throw this shock away. The 27 Series features QA1's deflective disc technology which allows racers to easily change their valve settings to suit specific driving and handling needs!