We have teamed up with Menscer Motorsports and developed a series of shocks targeted at the serious Gen 6 ZL1 drag racer. This series of shocks feature a wide range of adjustment, are custom valved for any combination, and comes complete with coil over hardware, Mag Ride Delete Sensors and a detailed set up guide. this is the same shock that's on the worlds fastest lt4 zl1 and the well known "watch ya neck" white zl1 that's unstoppable on the street. they are a Special Valving that is only offered threw us!