A spinal implant system comprising: an extender extending between a first end, which first end includes a post with a wall having an outer surface, and a second end configured for engaging a first implant, the extender defining a passageway; and a reducer configured for disposal within the passageway, and extending between a first end having a housing which includes an inner surface and a second end configured for engaging a second implant, the inner surface being engageable with the outer surface to fix the reducer in a selected orientation relative to the extender, wherein the second end of the extender is disposable between an expanded orientation and a non expanded orientation to engage the first implant and the second end of the reducer is translatable relative to the first end of the reducer to dispose the second implant with the first implant; wherein the inner surface defines a recess having a barrel configuration and wherein the inner surface is continuous and includes facing linear surfaces formed by linear walls and facing arcuate surfaces formed by arcuate walls; wherein the post has a barrel cross-section configuration, wherein the outer surface of the post includes opposite arcuate surfaces formed by transverse ribs and opposite linear surfaces formed by channel surfaces, which are formed in the arcuate surfaces, and by opposite side walls, wherein said opposite arcuate surfaces and said opposite linear surfaces form the wall being continuous and non-interrupted; wherein the inner surface is configured for alignment with the outer surface and the outer surface is seated in the recess defined by the inner surface. an extender extending between a first end, which first end includes a post with a wall having an outer surface, and a second end configured for engaging a first implant, the extender defining a passageway; and a reducer configured for disposal within the passageway, and extending between a first end having a housing which includes an inner surface and a second end configured for engaging a second implant, the inner surface being engageable with the outer surface to fix the reducer in a selected orientation relative to the extender, wherein the second end of the extender is disposable between an expanded orientation and a non expanded orientation to engage the first implant and the second end of the reducer is translatable relative to the first end of the reducer to dispose the second implant with the first implant; wherein the inner surface defines a recess having a barrel configuration and wherein the inner surface is continuous and includes facing linear surfaces formed by linear walls and facing arcuate surfaces formed by arcuate walls; wherein the post has a barrel cross-section configuration, wherein the outer surface of the post includes opposite arcuate surfaces formed by transverse ribs and opposite linear surfaces formed by channel surfaces, which are formed in the arcuate surfaces, and by opposite side walls, wherein said opposite arcuate surfaces and said opposite linear surfaces form the wall being continuous and non-interrupted; wherein the inner surface is configured for alignment with the outer surface and the outer surface is seated in the recess defined by the inner surface.