I've only had my LC for 3 weeks and today I had to use my horn for the first time. It's comparable to a small motorbikes horn. So, after a little research I ordered a set of OEM (Japan) horns (Toyota Part 08522-60010). I had to get them from Japan but the price was about $64 for the pair delivered after taxes. Videos are available on YouTube with the sound quality and very easy installation.