KellTrac Innovative shock and strut offerings are based on Viking Performance double adjustable designs with specific valving changes for better control. KellTrac Ultra Shocks are the most powerful and best performing double adjustable shock offerings available. Expect premium quality suspension upgrades to reduce your 60ft time and increase traction at the track. Kits available for S197 / S550 Mustang, Camaro and Challenger. Call 1-855-827-7223 for tech and pricing.