Well myself and my brother installed the Hennessey intake yesterday. I gave it a day so I could cool down a bit because what should be a straight foward and simple install was more of a headache.
For a simple review I cannot get any more detailed than to say DO NOT BUY THIS INTAKE!!!!!!!!
Wait for the Air Raid, Vararam, K&N or something else. That is unless they sell it for $100 because that is all it is worth.
Now for a in-depth review.
Purchase of the intake. This is where it started to get weird, I picked it up from ebay
as I thought Hennessey changed thier ways I could trust them. Well the following day, I emailed Dave and James wondering on when it will ship. Dave said within 48 hours James said 2-3 weeks. I was rather confused as how two people can be so far off it was unbelievable. Luckily for me Dave was right and it shipped that Tuesday. Meantime with my talk on the phone James wasn't the most polite individual so if you are to deal with Hennessey I would go with John or Dave and skip James alltogether.
Reciept of the Intake. When I recieved it I was excited to get it installed but although I had plans to paint it I was floored on how bad cosmetically these pieces looked. The heat shield was scratch beyond belief, weld splatter and one crappy paint job. The tubes were pitted and were bead blasted to hide some of the pitting I believe. With all that said I was able to overlook everything as I didn't mind doing the prep work to get it looking right. In all honesty though the only times I have seen parts this bad is when they are used!!!!!!!
Installation. 
Well we went to install it yesterday as we finally had some clear skies to work in. Taking off the OEM intake took only 5 minutes if that. Before I go any further, they sent the instructions for the V8 intake and not the V6
. First thing we pop on was the heat shield. This is where the poor engineering started. It simply did not fit the tire well properly so we ended up having to use stuff we had lying around to make it fit properly. This step we used a bushing. Next problem we had they sent a bolt, washers and nuts to finish the installation of the shield, well there was no place to use the bolt they sent as it was simply two small. We ended up using a simple poppit. We went to install the the rest and the headaches got worse. First off they sent 3/8 hose which should have been 1/2" as everything on the the instake they supplied and the existing breather hose uses 1/2" If there engineers can explain on how to properly install a 3/8" hose over 1/2 inch fitting I am all ears. Anyway next problem is that the sensor fitting hole was either drilled wrong on the intake they sent me or they improperly installed it based on the picture they have on their website. As we all know the sensor as to go a certain direction to work properly. Plus they tapped the holes which was fine but for $500 you would expect them to send the machine screws to match them. Just another thing we had to go buy. Next we attatched the filter was was out of its wrapper, another thing to was probably used!!!!!
Performance The car did seem to run smoother and gave the GMPP exhaust a little more growl. I am happy in this aspect. I will respond back after I have some more miles with it but right now I am happy with it on this aspect.
Overall. I wouldn't recommend this kit to anybody unless they lower thier cost and get the engineering done right because there simply was way to many problems for a $500 intake. With all the changes I have done to my car in the last few months this is the only one I truly regret doing as I should have waited.
So this is what it looks like installed.
