Royal Enfield Ensign Silencer,  inlet  1-1/4"., comes with a sleeve to suit 1-1/8" exhaust pipe, Factory illustrations show the longer of the tail fins either on the top or the bottom according to year, confirm in customer notes when ordering , which one required 

Has a fixing stud with separate bracket for easier fitting 

Use Silencer Clip ARMCLIP138

Made By Armours in the UK

Our HD triple plated silencers are made by Armours, using our own design corrosion resistant construction, typical 2 stroke internal design is all metal construction with removable & adjustable baffles. This design gives a nice tone without the use of moisture retaining absorption. Baffle design will vary according to type.