High performance pipe, calculated for the MHR 7T cylinder. Suitable for the Piaggio big wheel engine (Runner, NRG...)
http://www.roost.si/exhaust/exhaust_gallery/image.php?twg_album=Piaggio_Racing&twg_show=img_6924.jpg
http://www.roost.si/exhaust/exhaust_gallery/image.php?twg_album=Piaggio_Racing&twg_show=img_6924.jpg