Very durable cast iron cylinder with oval-Minachrom outlet port and 6 transfer ports. Very good performance increase up to higher revs makes it a great all-rounder and the top choice when looking for a reliable and powerful cylinder. The supplied Asso piston has a chrome and a cast piston ring. The chrome ring should always be used in the top ring groove. The Trophy comes with a very high squish band. Kit includes all seals and pistons. Comes without a head, as original head can be reused.