I finally upgraded my 2000 4-Runner's front brakes with those from a 2001 Tundra. They are a serious upgrade and bolt right on. They work great and really stop it, very smooth and powerful.
I found that the original steel spare wheel rubs the 199-mm calipers slightly. I bought a new aluminum wheel to match the ones on the truck and are using that as a spare.
The choice in brakes from the Tundra boils down to whether you want a bolt-on swap, or an almost-bolt-on swap.
The 199-mm set bolts on with no mods and this is the set I installed.
The 231-mm set gives better stopping, but at the price of having to mod your wheels if you have standard 6-spoke 4-Runner wheels like mine.
Here are the parts I bought as shown in Amazon.com:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 (X2) I know that they show a 5-lug rotor in the picture, but the numbers are correct for the Tundra.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
See these articles on the subject:
http://www.off-road.com/trucks-4x4/p...oject1620.html
https://www.yotatech.com/forums/f2/t...ss-red-133294/
https://www.yotatech.com/forums/f2/0...runner-146160/
http://www.off-road.com/trucks-4x4/p...oject1620.html
http://www.toyota-4runner.org/3rd-ge...a-upgrade.html