Sorry, I didn't have a lot of time to respond to this.
The Injen intake is better than the K&N intake for the following reasons.
1. Amsoil EA dry filter instead of a K&N oiled filter. The Amsoil filter is the best on the market, and every independent test will prove it. The K&N filter is one of the worst on the market, and independent data proves that as well. Dodge denies warranties left and right on Cummins motors with K&N intakes/filters installed. They even have a TSB out for it. Too many dirty engines because the filters flat out cannot filter as well as those engines need to.
2. Far more mandrel bent material. In fact, a good 3-4x as much tubing as the K&N. You actually get your money's worth with the Injen intake. The K&N re-uses the rubber hose that connects into the throttle body.
3. K&N is a hot air intake. It will not suck in any cold air. The heat shield included is a joke and does nothing to "shield" the filter from ambient hot air that sits at the top of the engine bay.
4. The performance claims are bogus. The dyno test is done taking the best result with the intake comparing to the worst result with the factory, not an average of all tests, and the tests are done with the hood open when the filter is installed. In other words, not a real-world scenario. The difference between a K&N intake and a stock intake with a bypassed intake resonator is at most 2hp with a tune. Is it worth $200? Well, is a lame excuse for an ambient heat shield and a pipe with a MAF mount welded on it worth $150? Yeah...I didn't think so.
The Injen is the only intake that comes remotely close to being worth the advertised price, and the only real benefits are sound and cosmetics. Otherwise, you'd get the same results bypassing the stock resonator.