The T-Demand Hub is made for those who want to use 5x114.3 wheels onto their Toyota 86, Scion FR-S or Subaru BRZ instead of the 5x100 wheels. It's a complete hub that will replace your existing. The main advantage of this item is that it allows you to run a bigger variety of wheels and it is not a spacer! That means that you don't add unnecessary spacer weight onto your car and it allows running a wider range of size/offsets. The PCD Changer Hub is made in collaboration with the same manufacturer who produces the OEM Toyota 86 ones. It can be used for circuit without any problem, it is OEM quality. We recommend using dual pattern (5x100 & 5x114.3) brake discs such as the ones available with Wilwood Big Brake Kits.