Bill Hamilton Posted February 7, 2014 Report Share Posted February 7, 2014 I recently purchased two High-Flow Air Filters for 10-14 GT500 Factory CAI ( http://vmptuning.com/07-12gt500/10upfilter/ ). Pretty good price for a reusable cleaner to use with a stock system. Anyways when I went to swap it out in my new 2014 Shelby GT-500 I noticed the stock factory air filter has a screen made into the air filter element whereas the aftermarket filter does not. On the 2003/4 Mach 1's there was also a screen that could cause idle and stalling issues if removed. I heard different stories about how it smoothed out the airflow and etc prior to entering the throttlebody. I do know I went back later and re-installed the screen (it was a separate part) when stalling issues developed and it cured my problem. Has anybody notice any stalling/idle issues using aftermarket air filters without the screen like on the stock air filter? I don't remember the screen on my 2011 GT-500 when I swapped out the stock air filter for a K&N but didn't encounter any issues. Quote Link to comment Share on other sites More sharing options...
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