Custom built to your length requirements. This shaft features MW 4130 forged steel weld yokes, 1350 series non-greaseable, lubed for life universal joints. 3-1/2" O.D. x .083" heat-treated chromoly tube. Transmission yoke required for balancing (yoke not included in price). 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.