STI will add goodies that will improve performance to the 2014 BRZ tS by tuning the chassis with large-diameter driveshaft and STI's suspension upgrades that will improve handling performance. The new tS should have improved handling in the corners with the addition of upgrades like a new STI rear suspension link with pillow ball bush, STI tuned strut and coil springs for front suspension and STI tuned damper and STI coil springs for the rear suspension. Stopping ability will be improved with the addition of 17-inch Brembo performance ventilated disc brakes that can be seen with the STI logo. Larger 18-inch aluminum wheels wrapped in 225/40ZR18 Michelin Pilot Super Sport tires will give the new tS a more commanding appearance. tS will also feature exclusively-tuned VDC (Vehicle Dynamics Control) for extra stability. Subaru is still working on engine upgrades for the BRZ STI, and for now we’ll have to settle for STI’s chassis upgrades that will come on the new BRZ tS