Monroe Front Sensa-Trac Shocks for all 65-73 C-Bodys, including 67-73 Imperials. Sensa-Trac Shocks adjust rapidly to changing Road and Weight conditions, Delivering Enhanced Control with uncompromised Ride Comfort. Sensa-Trac Ride Control products Automatically adjust to changing Conditions. They offer Superior comfort for normal driving and deliver extra control when Operating conditions get more demanding. Sold individually.