[Chris74]

Well I have a K&N 63 series and it sounds fairly horny as well.......especially on the highway at certain rpm's. I feel like my intake makes a difference at 3000 rpm and above like Bill said. However.......I can honestly say my truck feels stronger in the winter up here in Canada.
I realize that it only adds about 8 hp at 3500 rpm on a dyno, but I feel like mine offers more than that (atleast in the winter). I could be wrong but I wonder if "real world" performance could be better than the dyno would indicate ???.........atleast some of the time.
I know when it is -25 and I'm cruising at 65mph and pull out to pass.......my girl really talks business and the intake really growls. If it's that cold outside and I'm doing 65 mph, can you imagine the rush of freezing cold air coming into that engine? You couldn't measure that on a dyno.....could you?