Hotchkis Tuned 1.5 Adjustable Performance Series Rear Shock Dodge Plym A Body Take your 1963-76 Dodge/Plymouth A Body or 1970-74 Dodge Challenger to the pinnacle of performance for autocross and track days. Hotchkis-Tuned Adjustable Performance Series Shocks are one of the fastest easiest and most dramatic modifications you can make to a Mopar dramatically improving grip steering response and control. Adjustable Performance Series Shock Absorbers are manufactured by Fox and tuned by Hotchkis engineers to be the ultimate single adjustable shock for of your muscle car.