The CVD bearing drive shafts improve off-power steering and rotation, but decrease back traction and security. Suited to utilized in high-traction conditions, as well as for tracks with numerous hairpin corners. Set includes complete drive shaft just. Functions very well with optional #304972 - Gear Diff CVD BB Driveshaft Outdrives. The CVD BB drive shafts are suggested to utilize along side Gear Differential in back on a T4.