I loved how well everything fit together and how well the instructions were done. My only thing I found to be hard was getting the rubbing fitting to go on to the hard plastic but I say once on you know its going to stay on. I did end up having to buy a rubber hose since the one in the kit was a couple of inches short but nothing that was too bad. I still give it a full five star rating just due to the overall performance upgrade as well as the great look and amazing sound it makes now
I put this CAI on my 2008 Mustang Shelby GT CS and the outcome was amazing! The extra throttle response and power was and is unreal. Installation was easy and required no modification. All fittings fit tight without the clamps, so no chance of moisture or dirt entering your system. This system will wake up your pony and looks very professional! Its also nice because it can be used with or without a programmer. Just remember to unhook your negative battery cable so the computer can reset the air sensor. I researched CAI's for several weeks before going with this one and couldn't be happier!