Many tours, especially the later ones only have one horn. They sound a lot nicer with two. The easiest way to end up with two horns is to buy the FIAAM freeway blasters. They are slightly different in tone and a bit louder. The FIAAM normal horns are the same volume as stock. Whichever FIAAM you use, normal or freeway blaster, you should still buy a pair. They will sound better matched. Every OEM combination has a slightly different tone and if you mix and match they may or may not sound OK.
I thought the stock horns on my car sounded a bit weak so I bought a pair of freeway blasters. While mounting them I experimented with different combinations and ended up using all four, two original and two freeway blasters. The tone is better then either set by itself, and finally, it seems loud enough.
