Originally Posted by ta_man

I used Losi 8 buggy/truggy steering servo horns on both my EB410.2 and ET410.2. The truck has a full height servo and the buggy a low profile servo.

The horn itself is plastic but has metal inserts (including 23 tooth spline) to match the horn to the servo. Trying to buy them as a Losi packaged part is ridiculous because they always come in a package with a bunch of stuff you don't want, so I get them of eBay. The seller rc-waffle sells these pretty cheap. Here's a listing with the horn, various spline inserts and rod ends for $3.25 plus shipping:

https://www.ebay.com/itm/363690904521

That seller usually has multiples of these listed with slightly varying descriptions and he heavily discounts combined shipping so I would always try to buy a couple at a time. I use them where ever they can be fitted, including on my oval Mudboss cars because they are so strong.