Replacement CVD BB drive shaft 54mm made from world-renowned HUDY Spring Steel. This race-quality drive shaft is a spare part for #305408 CVD BB Drive Shaft 54mm - Set - HUDY Spring Steel????. Recommended for use in high-traction conditions, and for tracks with many hairpin corners. Must be used with #304972 - Gear Diff CVD BB Driveshaft Outdrives. Set of 2.