Triumph dealers have there hands tied and changed dramatically the way they do business. Talking with a dealer they will not put an aftermarket device of any kind on even a friggin horn. Even if the aftermarket add on are 100% legal they can not and will not do it anymore. I asked about a horn last year for my 2020 as they replaced one on my 14 Rocket. They stated they can't make any changes other than stock. They will sell you the horn but won't put it on even after the warranty is up. He went further and stated any motorcycle they buy from a party for a trade in must have 100% original parts all the way down to the mirrors. He said if they were to buy a 2017 or what ever year Rocket it must be original everything before they purchase it to sell. They will buy your Rocket if it doesn't have say the right horn or mirrors but they will take the price off to buy and install the items from your selling price. I wonder if this is policy or just in Suckafornia. Good times.