Driveline 1 is the high performance driveshaft specialist for both gas and diesel applications. Choose from a 1pc or 2pc design made from premium Carbon Fiber, Aluminum or Steel. Driveline has over 100 years of combined experience in Heavy Duty, Industrial or Passenger driveshafts. Take a serious look at the 1pc F-150 driveshaft, it measure 5in diameter and is designed for 2wd / 4wd vehicles. Beefcake Racing is an Authorized Dealer, call 1-855-827-7223.