Description: Fits Honda CBR300 CB300F CBR300R Hardware and installation instructions no included Full stainless steel body,excellent welding finish Offers difference flow and sound effect Note:Please check the size before buying,It may or may not fit without modification. Specification: Length: 265mm Inner diameter: 47mm/39mm Package Includes: 1 Piece Motorcycle Exhaust Middle Pipe Note: 1.We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one that you need. 2.Please allow 0.5-1 inch difference due to manual measurement.(1inch=2.54cm) 3.There are no instructions included in this kit. Professional Installation Is Highly Recommended?