These GPM 4140 carbon steel CVD driveshafts are engineered for strength and longevity under demanding use. The hardening black surface treatment improves wear resistance while the constant velocity geometry permits increased steering articulation for smoother mechanical operation and better torque transfer. Dimensionally, the shafts measure 50mm from the dog bone ends to the midpoint, maintaining consistent alignment and predictable handling during aggressive driving. This component is intended as a durable drivetrain upgrade where service life and dependable steering response are priorities.