The A2's horn is pretty useless. It's rarely needed but when it is, a loud horn can be a lifesaver. There were a few posts on the subject back in 2003 / 04 (see link) but nothing to show what really worked.
http://www.a2oc.net/forum/showthread.php?t=1509#7
Has anyone fitted a good horn recently or does anyone have experience of the Sparco unit i'm considering
http://www.priracing.com/product.php?xProd=1226&xSec=66&jssCart=bcc4459ec3cf5dac75ce558219f49b1c
Cheers Spike
http://www.a2oc.net/forum/showthread.php?t=1509#7
Has anyone fitted a good horn recently or does anyone have experience of the Sparco unit i'm considering
http://www.priracing.com/product.php?xProd=1226&xSec=66&jssCart=bcc4459ec3cf5dac75ce558219f49b1c
Cheers Spike