Morse TEC offers both Cam Torque Actuated (CTA)™ and Torsional Assist (TA)™ Phaser technologies to achieve reliable Variable Cam Timing (VCT) on a variety of engines, especially those using overhead cams. By allowing the camshaft to be phased relative to the crankshaft while the engine is running, VCT gives the engine designer added flexibility over a conventional fixed timing drive system.