Without a doubt, the 15" Avons (CR6ZZ) are among the best high-performance radial tires at this time for Cobras (V rated).
I have a pair for my car and they handle great. The primary downside is that they cost substantially more than many of the other 15" tires that guys use for their Cobras.
Do a quick search on "Avon tire" and you will find a few threads with additional information (e.g., other folks' experiences, where to purchase).
Good luck.
Stentor
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