Christmas horn remained on my car all year After buying a horn for an experiment to test whether or not the festive horns are persistent, I finally have an answer.

After not being able to use one of the festive surprise horns for a year which I had placed on my Shafter V12 last Christmas, I was finally able to use it again. I had not modified the horn during the year, and it was already applied to the car when I got to my garage.

Just a very lengthy experiment which proved to be worth it.