ram air intake

Installed a K&N intake kit (57-1533) on my 2006 Dodge Ram 1500 pickup 5.7L and am noticing what sounds to be backfires/misfires. The deep throaty growl is great, but with constant throttle applied cruising or going up incline, I'm hearing/feeling what I would best describe as a "thump", almost...

Okay so I've been thinking about trying to convert my hood scoop from one thats just for show to one that actually works as an air intake. For reference to what i'm talking about look at the dodge viper air intake. I've been looking at this since I got my truck a few years ago and so far it...