Substitution CVD BB drive shaft 50mm made from world-renowned HUDY Spring steel. This race-quality drive shaft is an extra component for #305409 CVD BB Drive Shaft 50mm - Set - HUDY Spring steel. Worthy of within high-traction conditions, as well as for songs with many hairpin corners. Can be used with optional #304972 - Gear Diff CVD BB Driveshaft Outdrives. Pair of 2.