- The Trackspec team of engineers is excited to introduce the FRS BRZ Heat Extracting Louver kit! We spent the day at WSIR doing before and after pressure testing to find the optimum placement and design for this extractor kit. We strapped our proprietary multi position pressure testing rig into the front seat of Mike Kang's very fast BRZ and gathered data thru the day. The results were excellent! We saw an average of a 43% reduction in underhood pressure (lift) over the area of the hood. We further verified flow by visual tuft testing as seen in the high speed photos.