402's...those are not as aggressive as 404's. I'd expect the 404's to have a rough idle, but many people who actually HAVE them told me that it idles like stock, given the proper tuning. If you guys go to the crower website, the 404's require an ECU mod for a reason. How many of you guys actually HAVE the 404's? I'm not trying to start anything, but I'm plannin on getting some 404's myself for a daily driver, and don't wanna be discouraged by people who have not experienced these cams and are giving different advice and comments about them...