The QA1 GM Coil-Over Shock is a great option for anyone looking for adjustable valving control for their suspension. Choose the valving to match your driving style and you're on your way. Adjustable Coil-Over Shock Features: Available in independent compression and rebound double adjustable, simultaneous compression and rebound adjustable, or drag "R" Series adjustable Lightweight Billet Aluminum Coil-Over Shocks Made in the USA Easy, Bolt-In Installation Ride Height Adjustable 100% Dyno Tested and Serialized Serviceable and Rebuildable by QA1 Authorized Service Centers Made in the USA Fits: 1970-1981 Camaros, Firebirds; 1955-1957 Chevy Full Size; 1964-1967 Chevy Chevelle, Malibu, El Camino; Buick Skylark; Oldsmobile 442, Cutlass, F-85; Pontiac GTO, Tempest, LeMans.