A delivery system for implanting a stent graft, comprising: a) a longitudinal body defining a longitudinal axis and having a proximal handle and a distal handle; b) a guidewire catheter having a proximal end and a distal end, and extending through the distal handle of the longitudinal body; c) a stent graft having a proximal end and a distal end, the stent graft extending about the guidewire catheter, the stent graft including i) a luminal graft component, and ii) a plurality of radial stents distributed longitudinally along the luminal graft component, at least one of the stents having struts that are joined to define proximal and distal apices; d) a torque component, including i) a pushrod extending about the guidewire catheter and distally from the proximal handle, wherein the pushrod has a proximal end that is fixed to the proximal handle, and ii) at least two arms having distal ends, the at least two arms being fixed to and disposed radially about the pushrod, and extending distally from the pushrod, each arm being moveable from a constricted state to an expanded state, whereby the torque component exhibits radial expansion, and wherein the distal ends of the at least two arms are engaged with the stent graft, whereby application of torque force to the torque component by rotation of the proximal handle about the longitudinal axis causes the stent graft to rotate about the longitudinal axis; and e) a radial constraint at the stent graft extending about the guidewire catheter, wherein the radial constraint includes at least one of a thread and a wire combination, and a flexible sheath extending about the stent graft, whereby the stent graft can be released from constraint by withdrawing the wire from the thread or the flexible sheath from the stent graft; and f) an introducer sheath extending about and radially constricting the torque component and the stent graft, the introducer sheath extending distally from the longitudinal body and being retractable from the stent graft and at least a portion of the torque component, and wherein at least partially retracting the introducer sheath from the stent graft and from the torque component causes the stent graft to shift from a first constrained position to a second constrained position, wherein the second constrained position is maintained by the radial constraint. a) a longitudinal body defining a longitudinal axis and having a proximal handle and a distal handle; b) a guidewire catheter having a proximal end and a distal end, and extending through the distal handle of the longitudinal body; c) a stent graft having a proximal end and a distal end, the stent graft extending about the guidewire catheter, the stent graft including i) a luminal graft component, and ii) a plurality of radial stents distributed longitudinally along the luminal graft component, at least one of the stents having struts that are joined to define proximal and distal apices; i) a luminal graft component, and ii) a plurality of radial stents distributed longitudinally along the luminal graft component, at least one of the stents having struts that are joined to define proximal and distal apices; d) a torque component, including i) a pushrod extending about the guidewire catheter and distally from the proximal handle, wherein the pushrod has a proximal end that is fixed to the proximal handle, and ii) at least two arms having distal ends, the at least two arms being fixed to and disposed radially about the pushrod, and extending distally from the pushrod, each arm being moveable from a constricted state to an expanded state, whereby the torque component exhibits radial expansion, and wherein the distal ends of the at least two arms are engaged with the stent graft, whereby application of torque force to the torque component by rotation of the proximal handle about the longitudinal axis causes the stent graft to rotate about the longitudinal axis; and i) a pushrod extending about the guidewire catheter and distally from the proximal handle, wherein the pushrod has a proximal end that is fixed to the proximal handle, and ii) at least two arms having distal ends, the at least two arms being fixed to and disposed radially about the pushrod, and extending distally from the pushrod, each arm being moveable from a constricted state to an expanded state, whereby the torque component exhibits radial expansion, and wherein the distal ends of the at least two arms are engaged with the stent graft, whereby application of torque force to the torque component by rotation of the proximal handle about the longitudinal axis causes the stent graft to rotate about the longitudinal axis; and e) a radial constraint at the stent graft extending about the guidewire catheter, wherein the radial constraint includes at least one of a thread and a wire combination, and a flexible sheath extending about the stent graft, whereby the stent graft can be released from constraint by withdrawing the wire from the thread or the flexible sheath from the stent graft; and f) an introducer sheath extending about and radially constricting the torque component and the stent graft, the introducer sheath extending distally from the longitudinal body and being retractable from the stent graft and at least a portion of the torque component, and wherein at least partially retracting the introducer sheath from the stent graft and from the torque component causes the stent graft to shift from a first constrained position to a second constrained position, wherein the second constrained position is maintained by the radial constraint.