The CTA Ford Camshaft Locking Kit, No. 7640U, is designed to service Ford 4.6L V8, 5.4L V8 and 6.8L V10 3V engines, which are found in the Mustang, Explorer, Expedition, Navigator and F-Series trucks between 2004 and 2012. This locking kit is designed to provide quick, easy and precise service. This kit includes the company's Ford Valve Spring Compresor tool. The 7640 locks the camshaft, while the 7639 locks the timing chain for precision service. This tool kit is comparable to Ford factory tools Nos. 567614 and 567617.