Front Pro Coil double adjustable stock mount shock. Coil-over shock only. Compressed length of 9.63" and extended length of 14.5". No spring included. QA1's coil-over shock for your 1963-1965 Buick Riviera offers fully adjustable ride height and valving control. Pick your spring rate and adjustability to fit your driving style, adjust the valving to match and you are on your way. They also utilize a fully threaded body that allows you to adjust your ride height for the perfect stance or to finely tune the weight balance for superior handling.