Don't know where to post this..... I don't like the fuel filler cap that came with my 2016 ST 1500 diesel.... so I used a 1.5" ABS plumbing pipe cap.... fits over the filler perfectly and I glued a magnet on the top to hold it on the filler door while fueling....works well.... I drive on gravel roads frequently and was concerned about dust possibly entering the fuel system.... easy to make...