Because you haven't had any issues with over heating or codes, I agree with everything that has been posted. Time to look for a new more efficient intercooler.
We offer the Forge unit for the N54, with it the average inlet temperature was 15 degrees Celsius (27 degrees Fahrenheit) colder than that of a stock intercooler, and thanks to it's design it is much more difficult to heat soak.
ECS Tuning