I purchased this because I read it was well matched with the TRD exhaust system I have installed on my '07 FJ. I also did not want to install a cold air intake because most of the reviews indicate that it is a waste of money due to loss of back pressure. It definitely makes it more responsive off the line but you really notice the improvement in mid-range acceleration without the whirling noise the Cold Air Intakes make. Lastly no messy oiling, which especially works if you take it off road with dusty conditions.
I noticed an immediate change in my truck's behavior. Throttle response was very noticeable and acceleration took less effort, less down shifting was required. This is my second dry flow air filter. Awesome product!
I am very happy with my purchase. The air filter was a direct fit and goes nicely with my TRD exhaust system for a noticeable hp improvement.