Yogi's Inc. offers standard and large horn buttons for 9-bolt wheels. Standard horn buttons will leave the wheel bolts exposed, and large horn buttons will cover them over.
3-bolt wheels require special horn kits provided by the 3-bolt wheel manufacturers.
If you have questions, or need help building your wheel/horn/adapter assembly, just give us a call. 800-373-1937.
Large (full coverage) horn button shown.