Summer tires - Sumitomo HTR ZIII's. I really bought these as cheap summer tires to autocross on before moving to ZII's or Rivals next year, but I'm surprised how much of an improvement these cheap summer tires are over stock BS Turanzas. I had a blast hitting some roundabouts and backroads today. Noticeably better grip and turn-in at lower speeds. Quicker responses to steering inputs at higher speeds. Can't wait to autocross on these next month, as the stock tires were awful last time.
For anyone that likes autocross/track or even backroads, I'd highly recommend performance summer tires as a first mod. Even the cheap ones will be a big improvement over the stock touring/passenger tires.
Here's the car on summer tires (mounted on 17x8 TSW Nurburgring's).