Substitution CVD BB drive shaft 52mm produced from world-renowned HUDY Spring metal. This race-quality drive shaft is an extra component for #305407 CVD BB Drive Shaft 52mm - Set - HUDY Spring metal????. Recommended for use in high-traction conditions, and for tracks with many hairpin corners. Can be utilized with #304972 - Gear Diff CVD BB Driveshaft Outdrives. Pair of 2.