Hey Mate,
Not sure what model car you have but I remember when Theo was fitting their CAI to my FG.
The factory snorkel actually has an opening on the lower front side, which lines up with the radiator fan.
This will draw in hot air being pulled through the radiator.
I asked Chris why Ford would actually do something so stupid and his response was something like "I don't know why Ford do half the stupid ***** they do"
To ensure good cold air to your engine there are few few things to consider.
Distance for air to travel
Obstructions for air to pass through/around
Surface area of filter
Air flow through filter
Temperature of air being drawn in.
The BPR CAI addresses all these concerns and that's why it's probably the best selling CAI as well as having the best results.
Think about all the piping and bends with a standard system and even the re-invented shaker.
Quality and size of filter.
K&N is the business, there may be a few filters that have better air flow but they don't last as long or warrant your engine for 1,000,000 miles!
(And it's freaking HUGE)
...and with temp, the only was to get colder air is to draw from outside the engine bay but in doing so, you end up putting a few big red X's next to the first things due to bends and distance..
If you think your engine still needs more air with the BPR CAI, you could cut a hole through the inner guard and pipe in more air but I doubt you will need it.
Bottom line, if you want more air into the engine ask Chris and Theo about another product they sell.
Kenne Bell
