The horns I like the best were on my 91-93 Cadillac Spring editions and they were called Trumpet horns. 4 horns with four different notes, A, C, D and F. That was the prettiest sounding horns I've ever heard. I went to the Caddy dealer and wanted those installed in my 2000 Deville and they did not want to do it because even with a relay they said it was not designed for that load. Don't buy it but didn't want to argue and also knew if I pushed the issue everything that ever went wrong with the car would of been attributed to that. Anyone out there I still have a Deville and XLR I'd like to have those horns on. Any engineer's?