The CVD bearing drive shafts improve off-power steering and rotation, but decrease back traction and protection. Suitable for used in high-traction conditions, as well as for songs with many hairpin corners. Set includes complete drive shaft just. Works extremely well with optional #304972 - Gear Diff CVD BB Driveshaft Outdrives. The CVD BB drive shafts are recommended to utilize along with Gear Differential in straight back on a T4.