I added on this filter, removing the hose from my cold air intake, and plugging that hole. This should be ample supply of air (filtered) to the PCV, and now it's not robbing from my CAI. No one has replied to my earlier post..... If anyone knows any reason I should not be running this mod? Please let me know!?? High resolution pics at: http://www.aanning.com/challenger_rtsp/PCV_filter1.JPG http://www.aanning.com/challenger_rtsp/PCV_filter2.JPG