A camshaft assembly comprising: a hollow outer shaft (2, 102a, 102b); an inner shaft received within the hollow outer shaft; and a plurality of cam lobes (6a, 6b), comprising at least one a stationary cam lobe (7, 307, 308, 309) fixed to the inner shaft or the outer shaft (2, 102a, 102b) and at least one moveable cam lobe (8, 306) which rotates relative to the stationary lobe (7, 307, 308, 309) and is mounted to the other inner shaft or outer shaft through a mechanical connection; the camshaft assembly characterized in that: a phaser (10, 310) is located between the plurality of cam lobes; a plurality of cam followers each contacting a moveable cam lobe (306, 8) or a stationary cam lobe (7, 307, 308, 309) or contacting both a moveable cam lobe (306, 8) and a stationary cam lobe (7, 307, 308, 309); such that the phaser (10, 310) moves the at least one moveable cam lobe (8, 306) through the inner shaft or the outer shaft relative to the stationary cam lobes (7, 307, 308, 309) fixed to the other of the inner shaft or the outer shaft the duration or timing of the valve event of the valves associated with the plurality of cam followers is altered; a variable cam timing phaser is mounted to the outer shaft (2, 102a, 102b) at one end, the variable cam timing phaser comprising: a housing with an outer circumference for accepting drive force mounted to the outer shaft; a rotor coaxially located within the housing, the housing and the rotor defining at least one vane separating a chamber in the housing, the vane being capable of rotation to shift the relative angular position of the housing and the rotor; and a control valve received by rotor for directing fluid to the chambers; wherein the variable cam timing phaser is oil pressure actuated, cam torque actuated, hybrid, or torsion assist. a hollow outer shaft (2, 102a, 102b); an inner shaft received within the hollow outer shaft; and a plurality of cam lobes (6a, 6b), comprising at least one a stationary cam lobe (7, 307, 308, 309) fixed to the inner shaft or the outer shaft (2, 102a, 102b) and at least one moveable cam lobe (8, 306) which rotates relative to the stationary lobe (7, 307, 308, 309) and is mounted to the other inner shaft or outer shaft through a mechanical connection; the camshaft assembly characterized in that: a phaser (10, 310) is located between the plurality of cam lobes; a plurality of cam followers each contacting a moveable cam lobe (306, 8) or a stationary cam lobe (7, 307, 308, 309) or contacting both a moveable cam lobe (306, 8) and a stationary cam lobe (7, 307, 308, 309); such that the phaser (10, 310) moves the at least one moveable cam lobe (8, 306) through the inner shaft or the outer shaft relative to the stationary cam lobes (7, 307, 308, 309) fixed to the other of the inner shaft or the outer shaft the duration or timing of the valve event of the valves associated with the plurality of cam followers is altered; a variable cam timing phaser is mounted to the outer shaft (2, 102a, 102b) at one end, the variable cam timing phaser comprising: a housing with an outer circumference for accepting drive force mounted to the outer shaft; a rotor coaxially located within the housing, the housing and the rotor defining at least one vane separating a chamber in the housing, the vane being capable of rotation to shift the relative angular position of the housing and the rotor; and a control valve received by rotor for directing fluid to the chambers; a phaser (10, 310) is located between the plurality of cam lobes; a plurality of cam followers each contacting a moveable cam lobe (306, 8) or a stationary cam lobe (7, 307, 308, 309) or contacting both a moveable cam lobe (306, 8) and a stationary cam lobe (7, 307, 308, 309); such that the phaser (10, 310) moves the at least one moveable cam lobe (8, 306) through the inner shaft or the outer shaft relative to the stationary cam lobes (7, 307, 308, 309) fixed to the other of the inner shaft or the outer shaft the duration or timing of the valve event of the valves associated with the plurality of cam followers is altered; a variable cam timing phaser is mounted to the outer shaft (2, 102a, 102b) at one end, the variable cam timing phaser comprising: a housing with an outer circumference for accepting drive force mounted to the outer shaft; a rotor coaxially located within the housing, the housing and the rotor defining at least one vane separating a chamber in the housing, the vane being capable of rotation to shift the relative angular position of the housing and the rotor; and a control valve received by rotor for directing fluid to the chambers; a housing with an outer circumference for accepting drive force mounted to the outer shaft; a rotor coaxially located within the housing, the housing and the rotor defining at least one vane separating a chamber in the housing, the vane being capable of rotation to shift the relative angular position of the housing and the rotor; and a control valve received by rotor for directing fluid to the chambers; wherein the variable cam timing phaser is oil pressure actuated, cam torque actuated, hybrid, or torsion assist.