Mark carefully welded on the six bungs that were needed to place two thermocouples, two air inlets, and two O2 sensors into the exhaust stream at predetermined locations. We needed to monitor the oxygen content of the exhaust at a point before and after our air injection ports. Air needed to be pumped into the exhaust so that the catalytic converters will have enough oxygen to burn properly and help reduce harmful emissions. In dyno testing, we were able to see a significant reduction of those harmful emissions using racing catalytic converters. We hope that we will see similar results once all of the data has been reviewed. One of the most meaningful results of that dyno testing was to find a very small drop in hp using the cats. So, racers don't have to worry that running cats will hurt their performance. The use of E85 fuel recorded a significant gain in hp and torque and the power curve was improved on the low end when we switched to the FI system on the dyno. A combo of E85 and FI results in more power.