Ford's 4.6/5.4L two and four valve engines have the capacity to make huge horsepower, but with the factory timing gear setup, the camshaft timing cannot be tuned. The COMP Cams Ford 4.6/5.4L SOHC and DOHC Adjustable Cam Gear Set provides up to 12 degrees of camshaft advance or retard. This ability to adjust the cam timing is important when performance engine modifications are completed. The cam gear set installs in exactly the same way as the original factory gears (already equipped with the proper sensor) and work with the Ford OE timing chains. Each gear features both a steel hub and steel outer gear for heightened durability and light weight.