On my silencer ring, one end of the split ring the holds it in was cut square, the other end was cut at an angle. If yours is that way, get a standard screwdriver with a tip no wider than the split ring. Work it under the end of the ring that is cut at an angle. By "work it under" I mean slight right to left twist with pressure. The tip will wedge itself right under there and work the ring out of the retainer.
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High Rider: 98.5 Ram 2500 4x4, 5 Spd, SB 13", A3000 turbo, DDP Stage 3 sticks, studded, 4" TB,, AEM Intake, Gauges, FASS95, S-Chips Tune
Low Rider: '06 Chevy 1/2 Ton, Victory Red, 2/4 Drop, roll pan, sport mirrors, rollin on 20's