A combustor pre-diffuser section for a gas turbine engine, comprising: an inner diffuser case having an annular outer wall and an annular inner wall positioned radially inward of the annular outer wall; and a first pre-diffuser fairing disposed between the annular outer wall and the annular inner wall, the first pre-diffuser fairing comprising: a first portion having a first side wall, a first radially inward plate and a first radially outward plate, and a second portion having a second side wall, a second radially inward plate and a second radially outward plate, wherein the inner diffuser case includes a first strut extending radially between the annular outer wall and the annular inner wall and wherein the first side wall and the second side wall are spaced apart in a circumferential direction to form a cavity configured to receive the first strut, wherein the first radially outward plate and the second radially outward plate are positioned at an offset distance from the annular outer wall, the combustor pre-diffuser section being characterised in that the first portion comprises a first aft end stop configured to abut against the inner diffuser case and wherein the second portion comprises a second aft end stop configured to abut against the inner diffuser case, wherein the first aft end stop and the second aft end stop is configured to abut against a lip extending radially inward from the annular outer wall of the inner diffuser case. an inner diffuser case having an annular outer wall and an annular inner wall positioned radially inward of the annular outer wall; and a first pre-diffuser fairing disposed between the annular outer wall and the annular inner wall, the first pre-diffuser fairing comprising: a first portion having a first side wall, a first radially inward plate and a first radially outward plate, and a second portion having a second side wall, a second radially inward plate and a second radially outward plate, wherein the inner diffuser case includes a first strut extending radially between the annular outer wall and the annular inner wall and wherein the first side wall and the second side wall are spaced apart in a circumferential direction to form a cavity configured to receive the first strut, wherein the first radially outward plate and the second radially outward plate are positioned at an offset distance from the annular outer wall, the combustor pre-diffuser section being characterised in that the first portion comprises a first aft end stop configured to abut against the inner diffuser case and wherein the second portion comprises a second aft end stop configured to abut against the inner diffuser case, wherein the first aft end stop and the second aft end stop is configured to abut against a lip extending radially inward from the annular outer wall of the inner diffuser case. a first portion having a first side wall, a first radially inward plate and a first radially outward plate, and a second portion having a second side wall, a second radially inward plate and a second radially outward plate, wherein the inner diffuser case includes a first strut extending radially between the annular outer wall and the annular inner wall and wherein the first side wall and the second side wall are spaced apart in a circumferential direction to form a cavity configured to receive the first strut, wherein the first radially outward plate and the second radially outward plate are positioned at an offset distance from the annular outer wall, the combustor pre-diffuser section being characterised in that the first portion comprises a first aft end stop configured to abut against the inner diffuser case and wherein the second portion comprises a second aft end stop configured to abut against the inner diffuser case, wherein the first aft end stop and the second aft end stop is configured to abut against a lip extending radially inward from the annular outer wall of the inner diffuser case.