Akrapovic CE merket slip-on system som tilbyr riktig lyd og utstråling. Passer de fleste GTS modeller. Må kombineres med katalysator for å oppfylle Euro4 godkjenning - se under tilbehør. Der finnes også karbon varmedeksel.
Her er produsentens egen beskrivelse av anlegget;

The Slip-On represents the first step in exhaust system tuning. It is simple to install and replaces a stock muffler. It also offers the best combination of price and performance.
With the Akrapovic Slip-On system you will get more power, more torque, and less weight. The Akrapovic Slip-On system gives your scooter that unmistakable deep resonant Akrapovic sound and also dramatically changes its visual appearance. Each product features Akrapovic's finest carbon fibre end caps.
EC type-approval is valid only when catalytic converter is installed.The Akrapovic exhaust system is not compatible for combination with the Vespa original chrome kit or rear side protection.