Replacement CVD BB drive shaft 50mm made from world-renowned HUDY Spring Steel. This race-quality drive shaft is a spare part for #305409 CVD BB Drive Shaft 50mm - Set - HUDY Spring Steel. Recommended for use in high-traction conditions, and for tracks with many hairpin corners. Must be used with optional #304972 - Gear Diff CVD BB Driveshaft Outdrives. Set of 2.