The technical advances achieved over the years allows us to bring you the finest Racing and Replacement driveshafts available. The PST "Critical Link" is a continuous filiment wound tube, allowing Power to be transmitted from fiber to fiber to bring the following advantages. . The finest driveshaft available anywhere. Each driveshaft is specifically designed by our Engineering Department to optimize the characteristics of Carbon Fiber required in your special application. Our newest "Critical Link" Carbon Fiber Driveshaft for Drag Racing application is 3 3/4" diameter, a 50" driveshaft weighs only 6LBS - with 1350 series solid U-Joints add 3LBS and Slip Yoke add approx 2 1/2LBS. All tube yokes are built from forgings specifically designed by PST for our carbon fiber applications. This carbon fiber driveshaft is a perfect answer to long, high RPM applications such as Pro-Stock Trucks and can be engineered for any amount of Horse Power. Years of use by many Pro Stock and Pro Mod teams have demonstrated the reliability of our carbon driveshafts. Many racers experience a half a tenth increase in performance just by going with a carbon fiber driveshaft.Pit Stop USA offers PST "Critical Link" Carbon Fiber Racing Driveshaft - 39.0" Length - 3-1/4" Diameter 302390 at low everyday prices. Be sure to check out all of our products from PST - Precision Shaft Technolgies including Precision Shaft Technolgies Carbon Fiber Driveshafts and PST Carbon Fiber Driveshafts.