Lot's of people talk about "the Lotus experience" when driving their car, but did you already have the Lotus horn experience?
Pushing the hornpush for the very first time seems to raise quite a few questionmarks. The original horn in the Elise is ..well let's say a little bit on the quiet side..

This twin electrical horn is a fit and forget solution which will increase noise and which will make sure people can actually hear you when you push that button :)

You can install these horns at the same location as the original horn (which you will have to remove).

The only thing you should not forget is to replace the Horn fuse by a 25 Amp item.