Custom built to your length requirements. This shaft features Spicer weld yokes, 1480 series cold forged, non-greasable, lubed for life u-joints. 3-1/2" O.D. x .083" heat treated chromoly tube, This shaft is designed to take the abuse that high horsepower applications can dish out. Transmission yoke required for balancing (yoke not included in the price). Mainly for use in Pro-Mod and Outlaw applications. Matching transmission yoke and rear-end yoke required. Meet SFI 43.1 specifications. Check service bulletin # 0049 for operating limits and critical speed charts. Refer to our Driveshaft Set-Up and Measuring Tips for help gathering your dimensions.