In the airbox there is some type of filter besides the air filter that is coverd and I was told that the tl has a system that sends hot air to throthlebody or something like that for winter when it gets very cold not sure. Hot air takes hp away dont want that.

 

What cold air intakes are in the market for a 2gn tl would a cold air of a type s fit a non type s

 

The '99 TL has a small radiator (not filter) built in the stock air box that warms up the outside air in the winter. If you open the stock air box up, you can see how to bypass it. if you get an aftermarket intake, it will also show you how.