The Hotchkis Sport Suspension Tuned 70390A Rear 1.5 SPS Adjustable shock absorbers manufactured by Fox have been specifically tuned by Hotchkis ride engineers to provide smooth ride and exceptional control to your for 1963-72 2wd Chevy C/10 Truck. The Hotchkis 1.5 SPS Adjustable shock absorbers feature the latest cutting edge lightweight smooth-bore Type III hard anodized seamless aluminum mono tube body with 22 postions of rebound adjustment. Application-tuned smooth riding digressive disc technology specially formulated oil and high pressure nitrogen provides consistent performance. Black anodized 6061-T6 billet aluminum end caps ? hard chrome plated heat treated alloy shafts are subjected to 100 hour salt spray testing. These shocks feature a duel sealing pack system wiper seal and scraper seal which cleans the shaft before reaching the main seal and preventing contaminants from entering the shock. End caps are black anodized 6061-T6 billet aluminum and feature polyurethane bushings. CNC machined cross bars and vehicle specific mounting hardware and Relocation Brackets makes these shocks a direct replacement for OE. Take your 1963-72 2wd Chevy C/10 to the next level of performance for autocross and track days. Hotchkis-Tuned 1.5 SPS Adjustable Shocks are one of the fastest easiest and most dramatic modifications you can make to the 1963-72 2wd Chevy C/10 dramatically improving grip steering response and control. Developed as part of a balanced system Hotchkis Adjustable Rear Shocks give your 1963-72 2wd Chevy C/10 balanced handling especially when combined with Hotchkis Front Sport Coil Springs Front Adjustable Shocks Rear Sport Springs and Sport Sway Bars. These shocks are made in the USA and are built with heavy duty billet aluminum end caps polyurethane bushings and ?? hard chrome plated heat treated alloy shafts ensuring years of trouble free operation. Lifetime Warranty and made in the USA. Bolt a pair on today and feel the difference.