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