Originally Posted by captainva

For the calipers only replace the fronts with the GX460 calipers. I'm pretty certain that the rears are the same for both. Stainless lines definitely help reduce the spongy feel because when you brake, the lines can't bulge out like the rubber ones so all of the fluid goes directly into the caliper. Changing out your brake fluid will help too but stainless lines make a bigger difference. At the end of the day its still a truck so the spongy feel is probably 50-60% gone and now light pedal pressure like the weight of your foot slows the truck where as before it did nothing for me. For the SS lines I used the following:
This thread has all the info you ever wanted to know about brake lines:
https://www.toyota-4runner.org/4th-g...line-info.html

Likewise this tread has all the info you need about the brake upgrade:
https://www.toyota-4runner.org/4th-g...n-4runner.html