Yasuni is getting into the maxi scooter market, and their exhaust systems are convincing as ever. The Yasuni 4 Exhaust (Black Carbon) for Vespa GTS 300cc is an excellent exhaust system for 4-stroke maxi scooters.It is street-legal (Euro 3 standard).

The Yasuni 4 is the perfect combination of impressive performance, classy design and ear-pleasing sound. Maxi scooter riders who are looking for a high-end replacement for their stock exhaust are well taken care of with this piece, with a 10% increase in power to boot.

It is really easy to mount and features several advantages over the original exhaust. It weighs 40% less which makes for improved agility. The widening diameter of the steel header pipe results in improved torque and power output (+ 10%). The header pipe is made of stainless steel and the aluminium silencer sports a classy black finish with Yasuni logo and carbon end cap.

A catalytic converter is available separately.

• header: stainless steel AISI-304
• power: 18.82 hp at 8,745 rpm
• weight: 2.55 kg
• colour: black / carbon
• homologation: Euro 3, E9, E 5