A modular prosthetic conduit system such as astent or stent graft system tailored for the repair of aneurysmsor other compromised vessel walls. The stent or stent graftsys-tem incorporates various means to interlock the multiple modularcomponents used in the repair procedure. The present inventionfurther provides a modular stent graft system tailored for there-pair of aneurysms or other compromised vessel walls that crossor are adjacent to a branch or bifurcation in a vessel.
