Ford Racing Performace Parts - 1996-2004 Mustang - HD Aluminum driveshaft assembly Manual transmission Fits 1996-04 Mustang and 1996-98 Cobra 4.6L with manual transmission. 31 spline yoke High strength, 3.5" diameter 0.114" wall thickness 6061-RT62 aluminum seamless drawn tube 1330 U-joints 45.5" long (CL to CL of U-joints) Will not fit 1999-04 Cobra