Factory horn(s)

[Floyd]

My STX has a very noticeable horn in traffic, in fact its a little embarrassing when I hit the lock button twice.

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[Larrykime]

Amazon.com: Stebel Nautilus Compact Motorcycle Air Horn - Loud - Black: Automotive

This is what I use to get attention in my Very Subdued MX-5 Miata. The little meep meep has become a giant "Hey You". I like it a lot. it was easy to install. It is 139 Decibels.