I just converted my 97 runners airbox/MAF to the newer 99-02 style. In case anyone deosnt know, the 96-98 MAF steups are more restrictive and very expesive to replace. (about $600 from the dealer)
You alos need to repin the MAF connector to work with the newer MAF. I was able to with the help of MTL4runner. The stock wire colors while looking at the back of the connector left to right are, Black/white stripe, brown/black stripe, yellow/green stripe, red/white stripe, white/blue stripe.
The modified pin setup is now, brown/black, yellow/red, red/white, black/white, white/blue.
While I had the airbox out, I also remove the airtube insde the fenderwell and removed the 90 deg off the plate the airbox hooks into.
Removing the 90 and the airtube is reported to give you better airflow, better throttle response and slightly better MPG's. It also is reported to give you more rear wheel HP than a K&N cold air setup for supercharged motors. Go to gadgetonline.com for more in depth details about that. Its actually one of the steps involved when installing the TRD 7th injector. I also upgraded my headlights to the 99-02 styla and will be installing my HID coversion in a couple weeks when my kit arrives. I will be doing a writeup on that when its done. Hope this helps anyone attempting this conversion!