Silencer devices for attenuating fluid borne noises are not, in and of themselves, new. Examples of heretofore known silencer devices of this type are shown in U.S. Pat. Nos. 2,940,537 issued on June 14, 1960 to C. D. Smith et al; 2,988,302 issued on June 13, 1961 to C. D. Smith; and 3,019,850 issued on Feb. 6, 1962 to J. J. March. In those heretofore known silencer devices having flow tubes attached to headers, the headers are of unitary construction material. Thus, in order to manufacture a family of silencer devices of different sizes, i.e., having differing numbers of flow tubes from one another, different manufacturing tooling, such as, for example, a metal forming die, must be used for each different sized header. This requires a proliferation of tooling and is therefore costly. Because it is costly and time consuming to set up manufacturing tooling, it is more efficient to manufacture more headers of a given size than may be needed at the time of manufacture and to put the excess number of headers in inventory for future use when needed. This solution is also expensive.