Kuryakyn 7718 Skull Horn Cover The stock cowbell horn cover is a great look for ol' Bessie, but on your bike it lacks attitude. Here's a better idea...stick Kuryakyn's wicked Skull Horn Cover onto your stock cowbell and transform bovine to bad in an instant! For Harley-Davidson&#174; models with stock cowbell horn cover. Sold individually. Note: Kuryakyn part number: 7718.