Grr said the bear
The problem I had was the instructions are really thin, they should tell you to install the filter to the lower chrome piece first thing . After I did that it was easy to assemble. The performance has been excellent, It says right on the box 25 horsepower and I believe you actually get more and I am very happy with it .
Recently purchased a BBK CAI for my 2005 Mustang GT. I already have a BBK Throttle body and BBK X-Pipe, so I went for the BBK intake to complete my intake/exhaust system. Install is very easy. About 30 to 45 minutes. BBK is a quality product and very happy with my choice. Even though BBK says you don't need a tune, I would still recommend one if installing this item. There are many intakes out there, but if you want a great product (especially if you own a Mustang, go with this one)
Fitting took just under 2 hours. As soon as you start the engine you can hear a lower note and at around 2000rpm the engine now comes alive. The difference in torque in the low end is noticeable and for the price this is a must have first mod. Next will be the BBk throttle body which will give even more gain!