Interesting read! Thanks. thumbs
Not sure about air horns though - they take to long to give any sound, even with a very short air pipe. I prefer Fiamm twintones as fitted to many motorcycles. Instant, loud!, sound. I fitted them to my 4/4...

Cheers,

Graham (G4FUJ)

Sold L44FOR 4/4 Giallo Fly
'09 Gen2 MINI Cooper ragtop
'90 LR 90 SW