I also run Federals, on multiple cars. They make excellent budget-minded tires. For races requiring 200tw, I use the Federal RS-RR, though I also have them on my daily Alfa Romeo, just for laughs. For the Boxster, my goof-off wheels have the Federal 595 SuperSteel.
Full set for the Alfa in 225x18 was about $500 to my door, and the bimmmer's race wheels, also RS-RR in 255x17, was pretty close to the same, maybe a bit more. You can get them from Amazon or Walmart, so shipping is usually very quick.
They make a LOT of road noise, but they perform well and last much longer than most other 200tw tires. I've used Federals in probably more than two dozen races by now, as well as a lot of goofing around, backroad burning, and highway cruising on three very different cars, and they performed very well for all of them. They might not be quite as quick as some of the really competitve 200tw tires, but they're less than half the price.
Too bad they don't make them in 315, or I'd have them on my 986 race wheels as well.
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