This complete Rear Coil Over Double Adjustable Shock Kit is great for the racer needing a custom set up. Designed for use with coil over shocks on an Mustang 8.8 rear axle. Light weight chrome moly mounting tube and larger 1/2" grade 8 shock mount bracket hardware over the standard 3/8" that other kits use. Built around the Viking Performance C209 Double Adjustable Coil Over Shock which has an 11.57" compressed height and 16.76 extended height. These shocks have 19 positions of compression and 19 positions of rebound adjustment for 361 different valving combinations. Axle mounting brackets are laser cut for a Mustang 8.8 axle with an 2.88" diameter. If you have an explorer 8.8 or 9" axle that has a 3" axle diameter see part number 2006-27 or 2006-124.