Well, I got my Injen cold air intake at the end of last week and installed the short ram version within 10 minutes of the box showing up on my doorstep. And yes, the install took all of 10 minutes--it was really that straight-forward. Injen did a great job with this setup. Not only do you get their usual top-notch quality, but the fitment was spot-on. Sometimes with aftermarket intakes, the mounting locations take a bit of imagination to get them just right, but this new Injen intake was as snug as could be. I was very happy to see how easily it was installed. I also like the fact that Injen made this as close to bolt-up as possible in regard to the recirc tube. That also bolts right on with no modification needed at all. This is the perfect option for intake setups in my opinion.
In case you're wondering why I kept the short ram version, it's because I'm planning to do some dyno runs of my VT and wanted to do a before-and-after of the SRI vs CAI. I'm sure Injen will provide dyno's for us of their product, but I specifically want to see how a catback exhaust effects these numbers as well. When I was doing the install, I took a look at the cold air extension and saw that it would be very straight-forward as well. The second pipe just clamps right on in place of the filter (which is moved down into the wheel well).
As far as the performance gains based on a "rear end evaluation", I can definitely feel a nice increase in the mid-range. When 2nd and 3rd gear kick in, you really feel it pull harder when compared to stock. Sound-wise, it's got a neat little "sucking" sound--and the factory BPV comes to life as well! I'm NOT a fan of loud BOV's, so the BPV is more than enough for my tastes. It's got a nice "whoosh" without being obnoxious. Overall, I'm very happy with the performance of this setup.