QA1 Pro-Rear Twintube Coil-Over Rear Single Adjustable Shock Kit - 1551-1850 lb - Progressive 175-350 lb/in Spring Rate H76015FXL Silent Mode - Turns Off

Silent Mode - Turns Off Most Cabin And Exterior Lights And Door Chime With Open Door/Ignition Chime Remains

Overall dimension is 13-1/2" x 7"

spring and cup assembly for number 1409/ number 1410

3-1/2 in ID

QA1 Pro-Rear Twintube Coil-Over Rear Single Adjustable Shock Kit - 1551-1850 lb - Progressive 175-350 lb/in Spring Rate H76015FXL Silent Mode - Turns OffUpgrade 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