It is pretty much snap-on. But, it vibrates at high speed. When the guys at the dealership reinstalled it once, it never vibrated. Hence, there must be a "secret" to putting it on correctly. I was hoping that the documentation would have hints, tips and tricks.umbertob said:Honestly, I didn't even know the RRS had a hood wind deflector available as an accessory... Sorry, can't find those instructions anywhere else either. Perhaps there arn't any, it's just a snap-and-go type of accessory?