This is the MXS GP90 exhaust from MXS Racing. Handmade, varnished and finished with an aluminum silencer. It is specially designed for MXS GP 2 90cc cylinders. After several tests, it works very well in combination with Hyper Racing cylinders from 86cc to 95cc. The exhaust flange (flange) for standard Minarelli 2-hole cylinder is available separately.