Spicer One-Piece Aluminum Driveshafts for Mustang reduce the driveline's overall weight, 19 pounds versus 39 pounds, minimize rotating mass for quicker quarter-mile track times. Constructed of lightweight 3.5" or 4" 6061-T6 aluminum tubing, these one-piece driveshafts are engineered to provide extra strength. Eliminating the need for a center bearing also improves clearance for lowered Mustangs. These Spicer Driveshafts are rated for use up to 900 horsepower with a 6-speed manual or automatic transmission.