Pit Stop USA is The Online Motorsports Superstore! PST, Inc / Performance Shaft Technologies has been a state of the art manufacturer of driveshafts for over 20 years. The PST "Critical Link"a" Carbon Fiber Racing Driveshaft 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 the PST Engineering Department to optimize the characteristics of Carbon Fiber. PST 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 approximately 2-1/2 lbs. All tube yokes are built from forgings specifically designed by PST for their 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 PST carbon driveshafts. Many racers experience a half a tenth increase in performance just by going with a carbon fiber driveshaft. PST Mild Steel automotive driveshafts feature seamless DOM Tubing as the basis to producing finely balanced driveshafts. PST produces this quality product with high gloss black or white finish. PST Aluminum Drive Shafts are manufactured from 6061-T6 DOM tubing which gives the most concentric Aluminum Driveshaft available. High strength aluminum tube yokes are Mig welded with less than 10 thousands total run out. This highly polished aluminum driveshaft is balanced to less than 1/4 oz/in to assure vibration free operation. PST offers standard and extra long Slip Yokes and replacement U-joints for most applications. We feature PST / Precision Shaft Technologies products at low everyday prices!