Custom Mount Rebound Adjustable Coil-Over Shock Absorbers For a comfortable compression setting with 18 valving options for rebound adjustment, QA1's Ultra Ride shock is the best for rodding. Rebound Adjustable with Comfortable Fixed Compression Coil-Over Lightweight Aluminum Ride Height Adjustable Spring Mounting Hardware Included 100% Dyno Tested and Serialized Revalveable and Rebuildable by the QA1 Factory or QA1 Authorized Service Centers American Made Precision Machined Aluminum Piston with PTFE Piston Band 5/8” Centerless Ground, Hard Chrome Plated, Solid Piston Rod Three Step Sealing System