You may want to check out this thread http://ferrarichat.com/forum/showthread.php?t=116873&highlight=spark+wires
Dear Ferraristi, I asked the same question a few years ago. I was recommended to Magnicor spiral wound spark plug wires. I've had great luck with them. I use them on my 91 Testarossa. But....doesn't the 512 incorporate a distributor module on each plug? Shamile Freeze...Miami Vice !