Substitution CVD BB drive shaft 54mm made from world-renowned HUDY Spring metal. This race-quality drive shaft is an additional component for #305408 CVD BB Drive Shaft 54mm - Set - HUDY Spring Steel????. suitable for within high-traction conditions, and for songs with many hairpin corners. May be used with #304972 - Gear Diff CVD BB Driveshaft Outdrives. Group of 2.