Competition Cams 102500 Xtreme Energy262AH-13 Camshaft Set for 4.6L & 5.4L SOHC Modular 2 Valve Ford with 1999-up Performance Improvement Heads SOHC - Xtreme Energy: Excellent low and mid range torque with more power. Will work with stock computer, best with custom tuning. 262/266 Advertised Duration, 226/230 Duration @ .050 inch, .550 inch/.550 inch Lift, 113 Lobe Separation Requires cam gear set part #10246SET Requires part #26113-16 valve springs and either 792-16 steel retainers or 791-16 titanium retainers Part #26125-16 high load valve springs also available