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, you can't "tune" your camshaft timing. Now, these new COMP Cams Ford 4.6/5.4L adjustable cam gear sets provide up to 12 degrees of camshaft advance or retard. This ability to adjust the camshaft timing is particularly important when performance engine modifications that can change camshaft-to-crankshaft centerline positioning and alter cam timing are completed. The COMP Cams Ford 4.6/5.4L adjustable cam gear sets come equipped with proper sensors to install them in exactly the same way as the original factory gears and work with the Ford OEM timing chains. Each gear features a billet aluminum hub and steel outer gear for heightened durability and light weight.