These are our 950HP 3.5" Heavy Duty Carbon Fiber drive shafts for the 3000GT VR-4 / Stealth VR-4. This shaft is designed to replace all of the factory 3-piece system. They are made from Carbon Fiber and 3.25" in diameter, it also direct fit flange to a u-joint style end and bolt to the factory rear diff flange. The Carbon fiber shaft is also more torsional than the shorter steel shaft and will help save the rest of the drivetrain from the harmful shock factor of launching the vehicle at the track. This Heavy Duty shaft is rated for 950HP.