These springs are the only true drop-in performance springs for the 5.0L 4-valve engine.

• No added cost for special retainers, spring cups, or seals 
• No machining necessary 
• Designed to work with all factory hardware 
• Give added spring pressure needed for most aftermarket camshafts 
• Eliminate valve float to reduce the risk of any engine damage in high lift or RPM applications

Specifications:

Install Height: 1.575
Max. Valve Spring Lift: .580
Spring Pressure Closed: 70lbs
Spring Pressure Open: 190
Coil Bind: .950