Rough idle good mid to upper RPM range, need to improve breathing

Crow Cams Ford 6 X-flow 250 4.1L 230/230

AU$304.00Price
  • Part No: 14650
    Rev Range: 2800-6000
    Intake Duration @ .050": 230
    Exhaust Duration @ .050": 230
    Intake Valve Lift: .522
    Exhaust Valve Lift: .522
    Lobe L/C: 113