27WON is probably the most expensive in that group, and the most enclosed so it would be the quietest. I have the Mishi and it sounds good, but it's also partially enclosed. No experience with AEM. PRL would be among the loudest as it's fully open.
Only thirty more minutes until I have only a half hour of work left so that I can get home and install it!!
That is debatable, especially on a Turbocharged engine where the turbocharger heats the hell out of that air anyways before it even hits the engine, truth be told if we were worried about air temps that much an intercooler upgrade is probably more worthwhile. PRL stated they did not see any heatsoak / performance losses when they were using the SRI, and do claim some performance gains. and forum members have also reported that the IAT with the SRI is no different than with the stock airbox or always within a few degrees. Now is it a CAI? No. But an SRI does allow for more airflow than the stock airbox and as such should have some gain over stock (Not CAI numbers though). The only case I have heard where heatsoak MAY occur is idling with extremely hot ambient temperatures, and some forum members have even debated if a CAI is excellent at that point due to high asphalt temperatures when in extremely hot climates.
The Injen one is particularly bad, that heat soaks like a MF.
