Ford Racing's premium roller rocker arm utilize high quality materials for a lightweight durable valve action.  The roller rocker arms by Ford Racing feature the following:

• Strong and lightweight aluminum construction
• Carefully machined to exacting tolerances
• Quality needle bearings for low friction high performance durability
• 1.6:1 ratio
• Stud mount for inline valves
  
• Does not require guide plates, hardened push rods or pedestal machining. Includes pedestal inserts & bolts.
• Fits 1978 and later 302/351W production cast iron and Ford Racing GT-40 Aluminum Cylinder Heads with hydraulic non-adjustable valvetrain.