corrugated bellows 43 is positioned between axial face 41 of aft seal ring 39 and axial face 29 of split ring 23 bellows 43 is preferably a free floating circumferential unit though one end of bellows 43 may be fixedly attached relative to engine 13 or to exhaust system 15 a lip 45 is formed on each axial ends of bellows 43 with lips 45 being formed to be parallel to axial faces 29 39 bellows 43 is compressed slightly between axial faces 29 41 to provide axial pressure between each lip 45 and the corresponding axial face 29 41 lips 45 and axial faces 29 41 cooperate to form face seals for preventing the escape of exhaust gases at the junction of engine 13 and exhaust system 15 continuing with fig3 a close up sectional view of bellows 43 shows how it relates to the nearby parts bellows 43 has corrugations 47 between lips 45 that may be compressed axially and allow for some radial movement of lips 45 relative to each other axial face 29 has a radial thickness that allows for radial movement of corresponding lip 45 a stop means such as stop 49 is located on an inner portion of face 29 to limit the radial movement of lip 45 additionally axial face 41 has a radial thickness that allows for radial movement of corresponding lip 45 and a corresponding stop 51 to limit radial movement of corresponding lip 45 because all radial movement is relative between axial face 29 and axial face 41 the.