| Designed to fit into cramped cowling and combines three tail tubes with one muffler. These tubes are blocked off. The modeler selects the tail tube required and drills out the thin blocked off section. |
| Dimensions | ||||
| Part | Engine Size | A | B | C |
| 11012 | .09 - .19 | 1.80 | 0.97 | 0.58 |
| 11033 | .29 - .40 | 2.20 | 1.20 | 0.71 |
| 11054 | .45 - .80 | 2.43 | 1.28 | 0.86 |