Built for use with TRZ G-Body Coil-Over Lower Control Arms. Comes complete with 2 Shocks, Coil-Over Hardware. and Springs Included. Allows for 4 in. of stroke. Uses AFCO’s Unique BNC Compression Valving. TRZ will provide an initial setup sheet upon purchase. Does not require a TRZ coil-over conversion kit, tapered spring fits inside factory spring pocket.