The Hotchkis Tuned 1.5 Street Performance Series shock absorbers manufactured by Fox have been specifically tuned by Hotchkis ride engineers brining a smooth ride and exceptional control to your 66 - 72 Plymouth Roadrunner 70 - 74 Barracuda. The Hotchkis 1.5 Street Performance Series shock absorbers feature the latest cutting edge mono tube shock technology in a lightweight smooth - bore Type III hard anodized aluminum body. The shocks feature smooth riding digressive disc technology a high - flow piston specially formulated oil and high pressure nitrogen for consistent performance under varying conditions and temperatures. Each shock is application tuned to offer superior ride comfort as well as vehicle control. For years of durability the 1.5 SPS shock features 12 hard chrome plated heat treated alloy shaft subjected to 100 hour salt spray testing. To prevent contaminants from entering the shock the rod guide employs a wiperscraper dual seal which cleans the shaft before reaching the main seal. End caps are black anodized 6061 - T6 billet aluminum and feature polyurethane bushings. CNC machined cross bars and vehicle specific mounting hardware makes these shocks a direct replacement for OE. Bolt a pair on today and feel the difference.