Choose from Ford Racing's high performance hydraulic roller tappet cams, from mild emissions legal to wild CamZilla the biggest and baddest cam that Ford Racing offers for your 1985-96 5.0L Mustang. On EFI engines, these performance cams work only with mass air induction systems. All of the below cams will also fit 1994-95 351W with factory roller cam when used with mass air EFI.
Note: Roller and flat tappet camshafts are NOT interchangeable.
Ford Racing #397-M-6250-F303
Duration: 226°/226° @ .050''
Notes: Rougher Idle than E303, More Mid- and Top-End Power than E303, Great for Superchargers,
Check Piston-to-Valve Clearances.