Includes a 85mm OEM Quality cylinder, which is made to your original Honda specifications. The kit also includes a brand new stock/std sized piston kit with rings, clips, wrist-pin, and head gasket/base gasket as pictured. This also includes a camshaft which will increase your bottom end power gains by up to 15 percent while increasing fuel economy at cruising speed. This is a DIRECT bolt on kit that will require no modifications.