QA1 Pro-Rear Twintube Coil-Over Rear Single Adjustable Shock Kit - 1551-1850 lb - Progressive 175-350 lb/in Spring Rate Engines Blocks & Components They provide maximum performance for

They provide maximum performance for engines with standard port location

Length listed is fully extended length with 10” of travel

Mobil 1 technology comes as standard equipment in many different performance vehicles

Includes 2 Gaskets

1963-1987 Pontiac Grand Prix

QA1 Pro-Rear Twintube Coil-Over Rear Single Adjustable Shock Kit - 1551-1850 lb - Progressive 175-350 lb/in Spring Rate Engines Blocks & Components They provide maximum performance forUpgrade your rear end with QA1's Pro Rear System. Available in double adjustable, single adjustable and ride sensitive valving non adjustable options,each adjustment has been carefully defined to provide the ideal horse curve to maximize performance. With evenly spaced valving changes throughout the adjustment range, there are no jumps when adjusting between any two clicks. These Pro Rear Systems are commonly used in drag racing, street performance