I missed your mileage on the tires, 5k is a lot of miles for a street tire to put on the track imo. Of course I haven't seen what you're running, just my past experineces...
Pirelli DC3, michelin 2ct, or Bridgestone BT002RS are good street/track tires.
the Bstones are 250 a pair, the Pirelli/Michelins are around 300 a pair.
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