This Driveshaft Shop one-piece carbon fiber CV driveshaft is specified for 2005–2011 Ford Mustang Shelby models with 6-speed transmissions and is listed with a 900HP rating. The description notes there are no clearance issues for the cited Shelby fitment. Offered as a single-piece carbon fiber shaft with CV joint, it is intended as a direct-fit replacement matching the Shelby 6-speed application without the clearance concerns mentioned.
DSS Ford 05-11 Mustang Shelby 6-Speed 1-Piece Carbon Fiber CV 900HP (no clearance issues) FDSH58-C