Carbon fiber driveshaft for circle track applications. With a length of 31.00", a diameter of 2.25" with a 1310 U-joint. Does not include an 8" slip yoke. With a 2.25" diameter, and available in all popular lengths with U-joints and an optional slip yoke, QA1 carbon fiber driveshafts are lighter, stronger and safer than aluminum and steel driveshafts.