BGM PRO Big Box Touring V2 Exhaust Vespa PX200, Rally200BGM PRO Big Box Touring V2 Exhaust PX200, Rally200 The BGM Big Box is a great exhaust! We have fitted several to tuned and standard engines. We have found that the exhaust works significantly better than other standard aftermarket Exhausts. The significant increase in torque and power output will allow the user to have a much better ride! We would recommend re jetting the exhaust with a 120 Main jet. Original optics High torque Thermally stable, even