It injects exhaust. Burned fuel air with NOx, CO, CO2, and very little oxygen. It does this to lower in cylinder combustion temp and reduce the formation of NOx

It injects exhaust. Burned fuel air with NOx, CO, CO2, and very little oxygen. It does this to lower in cylinder combustion temp and reduce the formation of NOx. Less oxygen in the cylinder means less temp which means less power. That is just a fact, it’s thermodynamic law, you literally can’t dispute it. The only Motorsport engines built for full throttle only are drag and pull engines, but where I race throttle response and the whole torque curve from 8,000 to 16,500 RPM is incredibly important. Find me an EGR system on any purpose built engine that didn’t have to comply with emissions. Industrial engines, race engines, tractors, generators… anything. That should illuminate what EGR is actually for.