Originally Posted by Tigeo
Thanks for the picture, just wanted to make sure I got the right one. Its been years since I had one and the lats one in my Toyota truck was just flat/same shape as stock. I assume also that you can put the lid back on the air box with it installed?
The stock filter is virtually the same size and shape (give or take a few milimeters), as a paper element round filter that just slip fits onto the MAF housing and into a groove in the airbox and lid.
Yes the lid drops right back into position and bolts on with the 4 8mm bolts.
I installed one after around 500 miles of driving, but noticed almost no difference in fuel economy directly before or after installing the filter, even as the engine broke in a bit. I've since swapped the stock airbox and K&N filter for a Steeda CAI about 3-500 miles ago (Car now has over 14,3xx miles on it).
The filter did seem to help throttle response somewhat, but it wasn't that dramatic, or I got used to it fairly quickly.
If you just want a mild modification that is re-useable, washable, and re-oilable to last the life of the car the K&N is a good option compared to the stock paper filters.