I got and installed mine, today. The fit, finish, and quality are all excellent. Equal to and better than OEM in many ways. Instructions were simple, accurate, and complete.
The sound difference is immediate. It's actually pretty aggressive with the radio off. With the radio on, it likely won't be noticed at normal radio volumes. I like it. It kindof brings you back to a "boy racer" moment, but then you can EASILY drown it out with normal radio volume. It's really aggressive for a vehicle in this class, IMO. Again, I like it. The Corksport video is "clean" due to lack of wind noise, but I'd not call it an over-exaggeration.
I filmed 0-80 runs and then used 20-80 as the comparison, counting frame by frame. The reason I did this was to eliminate any slight traction on take-off, wheel-slip, or making sure I got the roll-out accounted for or any of that BS.
-9.2 seconds from 20-80 using 91 octane and OEM airbox.
-9.14 seconds 20-80 using 93 octane and OEM airbox.
-9.28 20-80 using 87 octane and OEM airbox.
-9.12 20-80 using 91 octane and CorkSport.
Using this method, it does seem to have given what is most likely 8-12whp.
We "know" that 93 octane vs. 87 octane = 23bhp, and we can see a 0.14 second difference here. We also note a 0.06 second difference between 91 and 93 octane. Something I had not noted before, using other calculation methods that were less precise (0-...) due to the above factors mentioned. We notice a 0.08 second difference between 91 and OEM airbox and 91 and Corksport. This is roughly half, give/take the difference of 87 and 93 octane, which jives with Corksports rating of 8-12whp.
In short, I feel like I got EXACTLY what was advertised, to the letter.
One thing I will note, Corksport states one should use Loctite on the screws holding the bracket to the MAF housing. I strongly recommend formula 243, because it contains its own primer, and you are joining stainless to aluminum, anodized. These are typically a non-reactive juncture. Formula 241 is very sub-optimal, here. You can also use Vibratite VC3.
Based on the materials and thread sizes involved. I used 40 in-lb of toque to secure the bracket to the MAF housing, and 15 in-lb of torque to secure the MAF sensor to the housing.
You will need both a 3 and 5 millimeter Allen wrench, annoyingly.