I just installed these twin horns on my BMW GSA 16. I had to fabricate new longer wires to connect to the horn connectors as they were too short when purchased. Also other wires. Basically I had to redo all but one of the wires in the harness and also replace the fuse holder and fuse as the one that came with it looked pretty flimsy. In hindsight, I should have just built my own relay and recommended it, or bought a horn relay from a reputable electrical hookup supplier like Beaver Connection. After plugging everything in I checked the horns and boy were they super loud! I was going to buy more expensive Denali or Fiamm but decided to try these. I would recommend these horns or the slimline version/model for a more comfortable fit. I would just buy horns and build my own relay.
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