BDQQ 5492 Adjustable Phaser Lock Kit for Ford Coyote Engine - Performance Upgrade for Racing & Street Use

Cam phases are specially designed, computer-controlled cam gears that automatically optimize camshaft timing based on the current engine RPM and are currently used in all 2008+ Chrysler 5.7-6.4L VVT (Variable Valve Timing), 2005+ Ford Modular 3V, 2011+ Ford 5.0L DOHC Modular 4V V8 It-VCT and 2007+ GM Gen IV VVT engines. Engine oil is pressure-fed to the phases through passageways in the cylinder heads and cams. The engine computers control solenoids that adjust this oil flow into and out of the phases' control chambers, creating the ability to retard the cams. While this technology provides fuel efficiency and the ability to always be in the best position for maximum power, regardless of engine RPM, it does present some limitations when it comes to performance cams. With such a wide range of valve timing movement, there is very little piston-to-valve clearance, which limits you to small cam profiles with little overlap. This kit locks the phases.