To illustrate their importance, wide open throttle acceleration tests were conducted for roughly 11 seconds, both with stock cooling ducts and APR cooling ducts. IAT was measured post intercooler with high quality thermocouples. Ten back-to-back tests were conducted with each setup, and the results were averaged together. With the stock ducts in place, IAT rose to 66.2°C (151.2°F). This is above the factory knock threshold of 60°C (140°F) and is approaching the ECU power reduction limiter at 70°C (158°F). Once this IAT threshold is crossed, the ECU will begin aggressively reducing engine power to protect the engine. By simply swapping to the APR intercooler ducts, IAT dropped 15%, or 9.6°C (17.3°F), leveling off at 56.6°C (133.9°F). This is below the knock threshold and safely away from the power reduction threshold!

This Part Fits: