This exhaust system with the exhaust number 6916 is the original exhaust system for the following models:

- Vespa PX-125 E, Euro1, frame no. VNX2T..., type certificate no. 6P30-30, from the year 1992
- Vespa PX-125 E, Euro1, frame no. VNX2T..., type certificate no. 6P30-31, from the year 1992
- Vespa PX-125 E, Euro1, frame no. ZAPM093, type certificate no. 6PA4-50, from the year 2003

For the mentioned Vespas, this is the only legal, tested exhaust system.