Ring of Fire played on guitar (without Mexican Horns).

This Johnny Cash song, Ring of Fire was co-written by his wife June Carter Cash and Johnny had a dream where he heard the tune being played with Mexican horns. So he recorded it that way. For my performance, its just me and my guitar. Fortunately, I have a great sounding guitar!

In most of Johnny's performances, he had his guitarist Bob Wootton play the horn part.  

NOTE: Whatever it was, guitarist Bob Wootton inherently knew at an early age that his life's calling was to play music with Johnny Cash. The amazing thing is he achieved that goal, serving for nearly thirty years as Cash's lead guitarist, replacing the late Luther Perkins, who had been killed in a tragic house fire. READ MORE.