After over a year of testing we are proud to publicly release our house brand ko4 chra. Utilizing a cast compressor wheel these chra are conservatively rated at 22 psi. Each chra is sold individually and balanced on a cimat machine at 130000 rpm to ensure quality and reliability. Price listed above reflects the cost of 1 unit a total of two chra is needed for the 2.7t. Each unit is backed by a one year unlimited mile warranty from date of purchase.